diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 8925ddbfc92..4cdb0752b2b 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -75,17 +75,6 @@ Style/AndOr:
 Style/BlockDelimiters:
   Enabled: false
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/BlockEndNewline:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-Style/BracesAroundHashParameters:
-  Enabled: false
-
 # Offense count: 3
 Style/CaseEquality:
   Enabled: false
@@ -101,39 +90,6 @@ Style/CaseIndentation:
 Style/ClassAndModuleChildren:
   Enabled: false
 
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-Style/ClassCheck:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-Style/ClosingParenthesisIndentation:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/ColonMethodCall:
-  Enabled: false
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, AllowInnerBackticks.
-Style/CommandLiteral:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: Keywords.
-Style/CommentAnnotation:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-Style/DeprecatedHashMethods:
-  Enabled: false
-
 # Offense count: 153
 Style/Documentation:
   Enabled: false
@@ -144,32 +100,17 @@ Style/Documentation:
 Style/EmptyElse:
   Enabled: false
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/EmptyLinesAroundMethodBody:
-  Enabled: false
-
 # Offense count: 9
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 Style/EmptyLinesAroundModuleBody:
   Enabled: false
 
-# Offense count: 2
-# Cop supports --auto-correct.
-Style/EmptyLiteral:
-  Enabled: false
-
 # Offense count: 1
 # Configuration parameters: Exclude.
 Style/FileName:
   Enabled: false
 
-# Offense count: 3
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-Style/For:
-  Enabled: false
-
 # Offense count: 4
 # Configuration parameters: AllowedVariables.
 Style/GlobalVars:
@@ -186,49 +127,6 @@ Style/GuardClause:
 Style/IfUnlessModifier:
   Enabled: false
 
-# Offense count: 3
-# Cop supports --auto-correct.
-Style/IndentArray:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-Style/IndentationConsistency:
-  Enabled: false
-
-# Offense count: 5
-# Cop supports --auto-correct.
-# Configuration parameters: Width.
-Style/IndentationWidth:
-  Enabled: false
-
-# Offense count: 2
-# Cop supports --auto-correct.
-Style/InfiniteLoop:
-  Enabled: false
-
-# Offense count: 4
-# Cop supports --auto-correct.
-Style/LeadingCommentSpace:
-  Enabled: false
-
-# Offense count: 4
-# Cop supports --auto-correct.
-Style/LineEndConcatenation:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/MethodCallParentheses:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-Style/MethodDefParentheses:
-  Enabled: false
-
 # Offense count: 2
 Style/ModuleFunction:
   Enabled: false
@@ -237,64 +135,17 @@ Style/ModuleFunction:
 Style/MultilineBlockChain:
   Enabled: false
 
-# Offense count: 3
-# Cop supports --auto-correct.
-Style/MultilineBlockLayout:
-  Enabled: false
-
-# Offense count: 2
-# Cop supports --auto-correct.
-Style/MultilineIfThen:
-  Enabled: false
-
 # Offense count: 13
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 Style/MultilineOperationIndentation:
   Enabled: false
 
-# Offense count: 4
-Style/MultilineTernaryOperator:
-  Enabled: false
-
-# Offense count: 5
-# Cop supports --auto-correct.
-Style/NegatedIf:
-  Enabled: false
-
-# Offense count: 1
-Style/NestedTernaryOperator:
-  Enabled: false
-
 # Offense count: 10
 # Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
 Style/Next:
   Enabled: false
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/Not:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-Style/NumericLiterals:
-  MinDigits: 8
-
-# Offense count: 1
-Style/OneLineConditional:
-  Enabled: false
-
-# Offense count: 5
-Style/OpMethod:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: AllowSafeAssignment.
-Style/ParenthesesAroundCondition:
-  Enabled: false
-
 # Offense count: 63
 # Cop supports --auto-correct.
 # Configuration parameters: PreferredDelimiters.
@@ -311,27 +162,11 @@ Style/PerlBackrefs:
 Style/PredicateName:
   Enabled: false
 
-# Offense count: 3
-# Cop supports --auto-correct.
-Style/Proc:
-  Enabled: false
-
 # Offense count: 8
 # Configuration parameters: EnforcedStyle, SupportedStyles.
 Style/RaiseArgs:
   Enabled: false
 
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/RedundantBegin:
-  Enabled: false
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: AllowMultipleReturnValues.
-Style/RedundantReturn:
-  Enabled: false
-
 # Offense count: 7
 # Cop supports --auto-correct.
 Style/RedundantSelf:
@@ -361,19 +196,3 @@ Style/SpaceInsideStringInterpolation:
 # Cop supports --auto-correct.
 Style/TrailingUnderscoreVariable:
   Enabled: false
-
-# Offense count: 2
-# Cop supports --auto-correct.
-Style/UnneededPercentQ:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/WhileUntilDo:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: MaxLineLength.
-Style/WhileUntilModifier:
-  Enabled: false
diff --git a/bundler.gemspec b/bundler.gemspec
index 52f65b2a03b..8fc65647d5a 100644
--- a/bundler.gemspec
+++ b/bundler.gemspec
@@ -10,8 +10,8 @@ Gem::Specification.new do |s|
   s.authors     = ["André Arko", "Terence Lee", "Carl Lerche", "Yehuda Katz"]
   s.email       = ["andre.arko+terence.lee@gmail.com"]
   s.homepage    = "http://bundler.io"
-  s.summary     = %q{The best way to manage your application's dependencies}
-  s.description = %q{Bundler manages an application's dependencies through its entire life, across many machines, systematically and repeatably}
+  s.summary     = "The best way to manage your application's dependencies"
+  s.description = "Bundler manages an application's dependencies through its entire life, across many machines, systematically and repeatably"
 
   s.required_ruby_version     = ">= 1.8.7"
   s.required_rubygems_version = ">= 1.3.6"
diff --git a/lib/bundler.rb b/lib/bundler.rb
index 143d49e9cf9..9a46dede491 100644
--- a/lib/bundler.rb
+++ b/lib/bundler.rb
@@ -222,9 +222,11 @@ def root
     end
 
     def app_config_path
-      ENV["BUNDLE_APP_CONFIG"] ?
-        Pathname.new(ENV["BUNDLE_APP_CONFIG"]).expand_path(root) :
+      if ENV["BUNDLE_APP_CONFIG"]
+        Pathname.new(ENV["BUNDLE_APP_CONFIG"]).expand_path(root)
+      else
         root.join(".bundle")
+      end
     end
 
     def app_cache(custom_path = nil)
@@ -259,7 +261,7 @@ def with_clean_env
       with_original_env do
         ENV["MANPATH"] = ENV["BUNDLE_ORIG_MANPATH"]
         ENV.delete_if {|k, _| k[0, 7] == "BUNDLE_" }
-        if ENV.has_key? "RUBYOPT"
+        if ENV.key? "RUBYOPT"
           ENV["RUBYOPT"] = ENV["RUBYOPT"].sub "-rbundler/setup", ""
           ENV["RUBYOPT"] = ENV["RUBYOPT"].sub "-I#{File.expand_path("..", __FILE__)}", ""
         end
diff --git a/lib/bundler/cli.rb b/lib/bundler/cli.rb
index c481ac73228..150df56c7f6 100644
--- a/lib/bundler/cli.rb
+++ b/lib/bundler/cli.rb
@@ -48,15 +48,15 @@ def help(cli = nil)
       end
 
       manpages = %w(
-          bundle
-          bundle-config
-          bundle-exec
-          bundle-gem
-          bundle-install
-          bundle-package
-          bundle-update
-          bundle-platform
-          gemfile.5)
+        bundle
+        bundle-config
+        bundle-exec
+        bundle-gem
+        bundle-install
+        bundle-package
+        bundle-update
+        bundle-platform
+        gemfile.5)
 
       if manpages.include?(command)
         root = File.expand_path("../man", __FILE__)
@@ -411,24 +411,24 @@ def env
 
   private
 
-      # Automatically invoke `bundle install` and resume if
-      # Bundler.settings[:auto_install] exists. This is set through config cmd
-      # `bundle config auto_install 1`.
-      #
-      # Note that this method `nil`s out the global Definition object, so it
-      # should be called first, before you instantiate anything like an
-      # `Installer` that'll keep a reference to the old one instead.
-      def auto_install
-        return unless Bundler.settings[:auto_install]
-
-        begin
-          Bundler.definition.specs
-        rescue GemNotFound
-          Bundler.ui.info "Automatically installing missing gems."
-          Bundler.reset!
-          invoke :install, []
-          Bundler.reset!
-        end
+    # Automatically invoke `bundle install` and resume if
+    # Bundler.settings[:auto_install] exists. This is set through config cmd
+    # `bundle config auto_install 1`.
+    #
+    # Note that this method `nil`s out the global Definition object, so it
+    # should be called first, before you instantiate anything like an
+    # `Installer` that'll keep a reference to the old one instead.
+    def auto_install
+      return unless Bundler.settings[:auto_install]
+
+      begin
+        Bundler.definition.specs
+      rescue GemNotFound
+        Bundler.ui.info "Automatically installing missing gems."
+        Bundler.reset!
+        invoke :install, []
+        Bundler.reset!
       end
+    end
   end
 end
diff --git a/lib/bundler/cli/gem.rb b/lib/bundler/cli/gem.rb
index de673fa69d7..2704bbec7c5 100644
--- a/lib/bundler/cli/gem.rb
+++ b/lib/bundler/cli/gem.rb
@@ -195,7 +195,7 @@ def bundler_dependency_version
       req.join(".")
     end
 
-    def ensure_safe_gem_name name, constant_array
+    def ensure_safe_gem_name(name, constant_array)
       if name =~ /^\d/
         Bundler.ui.error "Invalid gem name #{name} Please give a name which does not start with numbers."
         exit 1
diff --git a/lib/bundler/cli/install.rb b/lib/bundler/cli/install.rb
index 2245f9585a7..1f5337d46ee 100644
--- a/lib/bundler/cli/install.rb
+++ b/lib/bundler/cli/install.rb
@@ -50,8 +50,8 @@ def run
         exit 1
       end
 
-      if (options["trust-policy"])
-        unless (Bundler.rubygems.security_policies.keys.include?(options["trust-policy"]))
+      if options["trust-policy"]
+        unless Bundler.rubygems.security_policies.keys.include?(options["trust-policy"])
           Bundler.ui.error "Rubygems doesn't know about trust policy '#{options["trust-policy"]}'. " \
             "The known policies are: #{Bundler.rubygems.security_policies.keys.join(", ")}."
           exit 1
diff --git a/lib/bundler/cli/outdated.rb b/lib/bundler/cli/outdated.rb
index 640e4f7ca7d..4c777df6e6a 100644
--- a/lib/bundler/cli/outdated.rb
+++ b/lib/bundler/cli/outdated.rb
@@ -32,7 +32,7 @@ def run
 
       out_count = 0
       # Loop through the current specs
-      gemfile_specs, dependency_specs = current_specs.partition {|spec| current_dependencies.has_key? spec.name }
+      gemfile_specs, dependency_specs = current_specs.partition {|spec| current_dependencies.key? spec.name }
       [gemfile_specs.sort_by(&:name), dependency_specs.sort_by(&:name)].flatten.each do |current_spec|
         next if !gems.empty? && !gems.include?(current_spec.name)
 
diff --git a/lib/bundler/cli/show.rb b/lib/bundler/cli/show.rb
index 44b5894a615..50cf0a97d55 100644
--- a/lib/bundler/cli/show.rb
+++ b/lib/bundler/cli/show.rb
@@ -23,7 +23,7 @@ def run
           spec = Bundler::CLI::Common.select_spec(gem_name, :regex_match)
           return unless spec
           path = spec.full_gem_path
-          if !File.directory?(path)
+          unless File.directory?(path)
             Bundler.ui.warn "The gem #{gem_name} has been deleted. It was installed at:"
           end
         end
diff --git a/lib/bundler/definition.rb b/lib/bundler/definition.rb
index 4f68c2248ed..85e82b4c77b 100644
--- a/lib/bundler/definition.rb
+++ b/lib/bundler/definition.rb
@@ -310,12 +310,10 @@ def to_lock
       out << "DEPENDENCIES\n"
 
       handled = []
-      dependencies.
-        sort_by(&:to_s).
-        each do |dep|
-          next if handled.include?(dep.name)
-          out << dep.to_lock
-          handled << dep.name
+      dependencies.sort_by(&:to_s).each do |dep|
+        next if handled.include?(dep.name)
+        out << dep.to_lock
+        handled << dep.name
       end
 
       # Record the version of Bundler that was used to create the lockfile
@@ -480,7 +478,7 @@ def converge_sources
       changes = false
 
       # Get the Rubygems sources from the Gemfile.lock
-      locked_gem_sources = @locked_sources.select {|s| s.kind_of?(Source::Rubygems) }
+      locked_gem_sources = @locked_sources.select {|s| s.is_a?(Source::Rubygems) }
       # Get the Rubygems remotes from the Gemfile
       actual_remotes = sources.rubygems_remotes
 
@@ -645,7 +643,7 @@ def source_requirements
     def pinned_spec_names(specs)
       names = []
       specs.each do |s|
-        # TODO when two sources without blocks is an error, we can change
+        # TODO: when two sources without blocks is an error, we can change
         # this check to !s.source.is_a?(Source::LocalRubygems). For now,
         # we need to ask every Rubygems for every gem name.
         if s.source.is_a?(Source::Git) || s.source.is_a?(Source::Path)
diff --git a/lib/bundler/dep_proxy.rb b/lib/bundler/dep_proxy.rb
index 378cefa1940..4efd99c9bbc 100644
--- a/lib/bundler/dep_proxy.rb
+++ b/lib/bundler/dep_proxy.rb
@@ -11,8 +11,8 @@ def hash
       @hash ||= dep.hash
     end
 
-    def ==(o)
-      dep == o.dep && __platform == o.__platform
+    def ==(other)
+      dep == other.dep && __platform == other.__platform
     end
 
     alias_method :eql?, :==
diff --git a/lib/bundler/dsl.rb b/lib/bundler/dsl.rb
index 5d7dfddf227..9df01fb905f 100644
--- a/lib/bundler/dsl.rb
+++ b/lib/bundler/dsl.rb
@@ -280,7 +280,7 @@ def normalize_options(name, version, opts)
       end
 
       # Save sources passed in a key
-      if opts.has_key?("source")
+      if opts.key?("source")
         source = normalize_source(opts["source"])
         opts["source"] = @sources.add_rubygems_source("remotes" => source)
       end
diff --git a/lib/bundler/fetcher.rb b/lib/bundler/fetcher.rb
index 829b709c381..6236bee7b60 100644
--- a/lib/bundler/fetcher.rb
+++ b/lib/bundler/fetcher.rb
@@ -223,7 +223,7 @@ def connection
     end
 
     # cached gem specification path, if one exists
-    def gemspec_cached_path spec_file_name
+    def gemspec_cached_path(spec_file_name)
       paths = Bundler.rubygems.spec_cache_dirs.map {|dir| File.join(dir, spec_file_name) }
       paths = paths.select {|path| File.file? path }
       paths.first
diff --git a/lib/bundler/gem_helper.rb b/lib/bundler/gem_helper.rb
index 33576bbdc82..ab7bcc27a0d 100644
--- a/lib/bundler/gem_helper.rb
+++ b/lib/bundler/gem_helper.rb
@@ -158,7 +158,11 @@ def name
 
     def sh(cmd, &block)
       out, code = sh_with_code(cmd, &block)
-      code == 0 ? out : raise(out.empty? ? "Running `#{cmd}' failed. Run this command directly for more detailed output." : out)
+      if code == 0
+        out
+      else
+        raise(out.empty? ? "Running `#{cmd}' failed. Run this command directly for more detailed output." : out)
+      end
     end
 
     def sh_with_code(cmd, &block)
diff --git a/lib/bundler/graph.rb b/lib/bundler/graph.rb
index e815f7dae98..cf5913ec707 100644
--- a/lib/bundler/graph.rb
+++ b/lib/bundler/graph.rb
@@ -95,15 +95,15 @@ def _patching_gem_dependency_class
       # method borrow from rubygems/dependency.rb
       # redefinition of matching_specs will also redefine to_spec and to_specs
       Gem::Dependency.class_eval do
-        def matching_specs platform_only = false
+        def matching_specs(platform_only = false)
           matches = Bundler.load.specs.select { |spec|
             self.name == spec.name and
               requirement.satisfied_by? spec.version
           }
 
           if platform_only
-            matches.reject! { |spec|
-              not Gem::Platform.match spec.platform
+            matches.select! { |spec|
+              Gem::Platform.match spec.platform
             }
           end
 
@@ -124,7 +124,7 @@ def initialize(graph_instance)
       end
 
       def g
-        @g ||= ::GraphViz.digraph(@graph_name, { :concentrate => true, :normalize => true, :nodesep => 0.55 }) do |g|
+        @g ||= ::GraphViz.digraph(@graph_name, :concentrate => true, :normalize => true, :nodesep => 0.55) do |g|
           g.edge[:weight]   = 2
           g.edge[:fontname] = g.node[:fontname] = "Arial, Helvetica, SansSerif"
           g.edge[:fontsize] = 12
diff --git a/lib/bundler/index.rb b/lib/bundler/index.rb
index 6c4ed3996c7..b9897199093 100644
--- a/lib/bundler/index.rb
+++ b/lib/bundler/index.rb
@@ -16,7 +16,7 @@ def self.build
     def initialize
       @sources = []
       @cache = {}
-      @specs = Hash.new {|h, k| h[k] = Hash.new }
+      @specs = Hash.new {|h, k| h[k] = {} }
       @all_specs = Hash.new {|h, k| h[k] = [] }
     end
 
@@ -24,7 +24,7 @@ def initialize_copy(o)
       super
       @sources = @sources.dup
       @cache = {}
-      @specs = Hash.new {|h, k| h[k] = Hash.new }
+      @specs = Hash.new {|h, k| h[k] = {} }
       @all_specs = Hash.new {|h, k| h[k] = [] }
 
       o.specs.each do |name, hash|
@@ -127,9 +127,9 @@ def size
       end
     end
 
-    def ==(o)
+    def ==(other)
       all? do |spec|
-        other_spec = o[spec].first
+        other_spec = other[spec].first
         (spec.dependencies & other_spec.dependencies).empty? && spec.source == other_spec.source
       end
     end
diff --git a/lib/bundler/installer.rb b/lib/bundler/installer.rb
index e4a9a8c9fe8..00bd2158ebb 100644
--- a/lib/bundler/installer.rb
+++ b/lib/bundler/installer.rb
@@ -123,7 +123,7 @@ def generate_bundler_executable_stubs(spec, options = {})
           options[dep.name] = bins unless bins.empty?
         end
         if options.any?
-          Bundler.ui.warn "#{spec.name} has no executables, but you may want " +
+          Bundler.ui.warn "#{spec.name} has no executables, but you may want " \
             "one from a gem it depends on."
           options.each {|name, bins| Bundler.ui.warn "  #{name} has: #{bins.join(", ")}" }
         else
@@ -264,7 +264,7 @@ def install_in_parallel(size, standalone, force = false)
     def create_bundle_path
       Bundler.mkdir_p(Bundler.bundle_path.to_s) unless Bundler.bundle_path.exist?
     rescue Errno::EEXIST
-      raise PathError, "Could not install to path `#{Bundler.settings[:path]}` " +
+      raise PathError, "Could not install to path `#{Bundler.settings[:path]}` " \
         "because of an invalid symlink. Remove the symlink so the directory can be created."
     end
 
diff --git a/lib/bundler/lazy_specification.rb b/lib/bundler/lazy_specification.rb
index 43d9dc993d5..f0efbc448f9 100644
--- a/lib/bundler/lazy_specification.rb
+++ b/lib/bundler/lazy_specification.rb
@@ -19,7 +19,7 @@ def initialize(name, version, platform, source = nil)
     end
 
     def full_name
-      if platform == Gem::Platform::RUBY or platform.nil? then
+      if platform == Gem::Platform::RUBY or platform.nil?
         "#{@name}-#{@version}"
       else
         "#{@name}-#{@version}-#{platform}"
diff --git a/lib/bundler/remote_specification.rb b/lib/bundler/remote_specification.rb
index 5a32bd24355..3050c373715 100644
--- a/lib/bundler/remote_specification.rb
+++ b/lib/bundler/remote_specification.rb
@@ -27,7 +27,7 @@ def fetch_platform
     end
 
     def full_name
-      if platform == Gem::Platform::RUBY or platform.nil? then
+      if platform == Gem::Platform::RUBY or platform.nil?
         "#{@name}-#{@version}"
       else
         "#{@name}-#{@version}-#{platform}"
diff --git a/lib/bundler/retry.rb b/lib/bundler/retry.rb
index 85bff788075..4b0fff4bd5d 100644
--- a/lib/bundler/retry.rb
+++ b/lib/bundler/retry.rb
@@ -25,9 +25,7 @@ def attempt(&block)
       @current_run = 0
       @failed      = false
       @error       = nil
-      while keep_trying? do
-        run(&block)
-      end
+      run(&block) while keep_trying?
       @result
     end
     alias_method :attempts, :attempt
diff --git a/lib/bundler/rubygems_ext.rb b/lib/bundler/rubygems_ext.rb
index eddd1fa191d..9e4ce5ac17f 100644
--- a/lib/bundler/rubygems_ext.rb
+++ b/lib/bundler/rubygems_ext.rb
@@ -22,15 +22,19 @@ class Specification
     alias_method :rg_loaded_from,   :loaded_from
 
     def full_gem_path
-      source.respond_to?(:path) ?
-        Pathname.new(loaded_from).dirname.expand_path(Bundler.root).to_s.untaint :
+      if source.respond_to?(:path)
+        Pathname.new(loaded_from).dirname.expand_path(Bundler.root).to_s.untaint
+      else
         rg_full_gem_path
+      end
     end
 
     def loaded_from
-      relative_loaded_from ?
-        source.path.join(relative_loaded_from).to_s :
+      if relative_loaded_from
+        source.path.join(relative_loaded_from).to_s
+      else
         rg_loaded_from
+      end
     end
 
     def load_paths
@@ -48,9 +52,11 @@ def load_paths
     if method_defined?(:extension_dir)
       alias_method :rg_extension_dir, :extension_dir
       def extension_dir
-        @extension_dir ||= source.respond_to?(:extension_dir_name) ?
-          File.expand_path(File.join(extensions_dir, source.extension_dir_name)) :
+        @extension_dir ||= if source.respond_to?(:extension_dir_name)
+          File.expand_path(File.join(extensions_dir, source.extension_dir_name))
+        else
           rg_extension_dir
+        end
       end
     end
 
diff --git a/lib/bundler/rubygems_integration.rb b/lib/bundler/rubygems_integration.rb
index b33d76b1151..b5ae60d5ed7 100644
--- a/lib/bundler/rubygems_integration.rb
+++ b/lib/bundler/rubygems_integration.rb
@@ -186,7 +186,7 @@ def fetch_all_remote_specs
       # Then fetch the prerelease specs
       fetch_prerelease_specs.each {|k, v| spec_list[k] += v }
 
-      return spec_list
+      spec_list
     end
 
     def with_build_args(args)
@@ -229,7 +229,7 @@ def build(spec, skip_validation = false)
     end
 
     def build_gem(gem_dir, spec)
-       build(spec)
+      build(spec)
     end
 
     def download_gem(spec, uri, path)
@@ -594,7 +594,7 @@ def gem_from_path(path, policy = nil)
         require "rubygems/package"
         p = Gem::Package.new(path)
         p.security_policy = policy if policy
-        return p
+        p
       end
 
       def build(spec, skip_validation = false)
@@ -625,7 +625,7 @@ def backport_ext_builder_monitor
         require "rubygems/ext"
 
         Gem::Ext::Builder.class_eval do
-          if !const_defined?(:CHDIR_MONITOR)
+          unless const_defined?(:CHDIR_MONITOR)
             const_set(:CHDIR_MONITOR, EXT_LOCK)
           end
 
diff --git a/lib/bundler/runtime.rb b/lib/bundler/runtime.rb
index 28767af5e24..5f340a3e646 100644
--- a/lib/bundler/runtime.rb
+++ b/lib/bundler/runtime.rb
@@ -61,7 +61,7 @@ def require(*groups)
       @definition.dependencies.each do |dep|
         # Skip the dependency if it is not in any of the requested
         # groups
-        next unless ((dep.groups & groups).any? && dep.current_platform?)
+        next unless (dep.groups & groups).any? && dep.current_platform?
 
         required_file = nil
 
diff --git a/lib/bundler/settings.rb b/lib/bundler/settings.rb
index 0ebde20c71b..bf465f8eec8 100644
--- a/lib/bundler/settings.rb
+++ b/lib/bundler/settings.rb
@@ -199,7 +199,7 @@ def get_array(key)
     end
 
     def set_array(key, array)
-     self[key] = (array.empty? ? nil : array.join(":")) if array
+      self[key] = (array.empty? ? nil : array.join(":")) if array
     end
 
     def set_key(key, value, hash, file)
diff --git a/lib/bundler/similarity_detector.rb b/lib/bundler/similarity_detector.rb
index de2de05992d..624238552c1 100644
--- a/lib/bundler/similarity_detector.rb
+++ b/lib/bundler/similarity_detector.rb
@@ -38,20 +38,19 @@ def levenshtein_distance(this, that, ins = 2, del = 2, sub = 1)
       fill = [0] * (this.length - 1)
 
       # Initialize first column values
-      for i in 1..that.length
+      (1..that.length).each do |i|
         dm[i] = [i * del, fill.flatten]
       end
 
       # populate matrix
-      for i in 1..that.length
-        for j in 1..this.length
+      (1..that.length).each do |i|
+        (1..this.length).each do |j|
           # critical comparison
           dm[i][j] = [
-               dm[i - 1][j - 1] +
-                 (this[j - 1] == that[i - 1] ? 0 : sub),
-               dm[i][j - 1] + ins,
-               dm[i - 1][j] + del
-         ].min
+            dm[i - 1][j - 1] + (this[j - 1] == that[i - 1] ? 0 : sub),
+            dm[i][j - 1] + ins,
+            dm[i - 1][j] + del
+          ].min
         end
       end
 
diff --git a/lib/bundler/source/git.rb b/lib/bundler/source/git.rb
index 7c0abc5637f..c18341d17e5 100644
--- a/lib/bundler/source/git.rb
+++ b/lib/bundler/source/git.rb
@@ -49,9 +49,10 @@ def hash
         [self.class, uri, ref, branch, name, version, submodules].hash
       end
 
-      def eql?(o)
-        o.is_a?(Git) && uri == o.uri && ref == o.ref && branch == o.branch && name == o.name && version == o.version &&
-        submodules == o.submodules
+      def eql?(other)
+        other.is_a?(Git) && uri == other.uri && ref == other.ref &&
+          branch == other.branch && name == other.name &&
+          version == other.version && submodules == other.submodules
       end
 
       alias_method :==, :eql?
diff --git a/lib/bundler/source/git/git_proxy.rb b/lib/bundler/source/git/git_proxy.rb
index bc6513bcea9..f7de1a0a568 100644
--- a/lib/bundler/source/git/git_proxy.rb
+++ b/lib/bundler/source/git/git_proxy.rb
@@ -122,7 +122,7 @@ def git_retry(command)
 
         def git(command, check_errors = true)
           raise GitNotAllowedError.new(command) unless allow?
-          out = SharedHelpers.with_clean_git_env { %x{git #{command}} }
+          out = SharedHelpers.with_clean_git_env { `git #{command}` }
           raise GitCommandError.new(command, path) if check_errors && !$?.success?
           out
         end
diff --git a/lib/bundler/source/path.rb b/lib/bundler/source/path.rb
index 1772a819c9a..b2c2f8c9783 100644
--- a/lib/bundler/source/path.rb
+++ b/lib/bundler/source/path.rb
@@ -56,10 +56,10 @@ def hash
         [self.class, expanded_path, version].hash
       end
 
-      def eql?(o)
-        o.instance_of?(Path) &&
-        expanded_path == expand(o.path) &&
-        version == o.version
+      def eql?(other)
+        other.instance_of?(Path) &&
+          expanded_path == expand(other.path) &&
+          version == other.version
       end
 
       alias_method :==, :eql?
diff --git a/lib/bundler/source/rubygems.rb b/lib/bundler/source/rubygems.rb
index a9b10f59365..26c1e7cd177 100644
--- a/lib/bundler/source/rubygems.rb
+++ b/lib/bundler/source/rubygems.rb
@@ -37,8 +37,8 @@ def hash
         @remotes.hash
       end
 
-      def eql?(o)
-        o.is_a?(Rubygems) && o.credless_remotes == credless_remotes
+      def eql?(other)
+        other.is_a?(Rubygems) && other.credless_remotes == credless_remotes
       end
 
       alias_method :==, :eql?
@@ -132,7 +132,8 @@ def install(spec, opts = {})
 
           installed_spec = nil
           Bundler.rubygems.preserve_paths do
-            installed_spec = Bundler::GemInstaller.new(path,
+            installed_spec = Bundler::GemInstaller.new(
+              path,
               :install_dir         => install_path.to_s,
               :bin_dir             => bin_path.to_s,
               :ignore_dependencies => true,
@@ -287,18 +288,18 @@ def installed_specs
 
           # Always have bundler locally
           unless have_bundler
-           # We're running bundler directly from the source
-           # so, let's create a fake gemspec for it (it's a path)
-           # gemspec
-           bundler = Gem::Specification.new do |s|
-             s.name     = "bundler"
-             s.version  = VERSION
-             s.platform = Gem::Platform::RUBY
-             s.source   = self
-             s.authors  = ["bundler team"]
-             s.loaded_from = File.expand_path("..", __FILE__)
-           end
-           idx << bundler
+            # We're running bundler directly from the source
+            # so, let's create a fake gemspec for it (it's a path)
+            # gemspec
+            bundler = Gem::Specification.new do |s|
+              s.name     = "bundler"
+              s.version  = VERSION
+              s.platform = Gem::Platform::RUBY
+              s.source   = self
+              s.authors  = ["bundler team"]
+              s.loaded_from = File.expand_path("..", __FILE__)
+            end
+            idx << bundler
           end
           idx
         end
@@ -345,7 +346,7 @@ def remote_specs
             api_fetchers.each do |f|
               Bundler.ui.info "Fetching gem metadata from #{f.uri}", Bundler.ui.debug?
               idx.use f.specs(dependency_names, self)
-              Bundler.ui.info "" if !Bundler.ui.debug? # new line now that the dots are over
+              Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
             end
 
             # Suppose the gem Foo depends on the gem Bar.  Foo exists in Source A.  Bar has some versions that exist in both
@@ -358,7 +359,7 @@ def remote_specs
               api_fetchers.each do |f|
                 Bundler.ui.info "Fetching version metadata from #{f.uri}", Bundler.ui.debug?
                 idx.use f.specs(idx.dependency_names, self), true
-                Bundler.ui.info "" if !Bundler.ui.debug? # new line now that the dots are over
+                Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
               end
               break if idxcount == idx.size
             end
@@ -373,7 +374,7 @@ def remote_specs
               api_fetchers.each do |f|
                 Bundler.ui.info "Fetching dependency metadata from #{f.uri}", Bundler.ui.debug?
                 idx.use f.specs(unmet, self)
-                Bundler.ui.info "" if !Bundler.ui.debug? # new line now that the dots are over
+                Bundler.ui.info "" unless Bundler.ui.debug? # new line now that the dots are over
               end if unmet.any?
             else
               allow_api = false
diff --git a/spec/bundler/dsl_spec.rb b/spec/bundler/dsl_spec.rb
index 169843bbe51..fc315316029 100644
--- a/spec/bundler/dsl_spec.rb
+++ b/spec/bundler/dsl_spec.rb
@@ -33,7 +33,7 @@
       end
 
       it "converts numeric :gist to :git" do
-        subject.gem("not-really-a-gem", :gist => 2859988)
+        subject.gem("not-really-a-gem", :gist => 2_859_988)
         github_uri = "https://gist.github.com/2859988.git"
         expect(subject.dependencies.first.source.uri).to eq(github_uri)
       end
diff --git a/spec/bundler/fetcher_spec.rb b/spec/bundler/fetcher_spec.rb
index fd72f457c58..622c25d2876 100644
--- a/spec/bundler/fetcher_spec.rb
+++ b/spec/bundler/fetcher_spec.rb
@@ -19,14 +19,14 @@
 
     describe "include CI information" do
       it "from one CI" do
-        with_env_vars({ "JENKINS_URL" => "foo" }) do
+        with_env_vars("JENKINS_URL" => "foo") do
           ci_part = fetcher.user_agent.split(" ").find {|x| x.match(%r{\Aci/}) }
           expect(ci_part).to match("jenkins")
         end
       end
 
       it "from many CI" do
-        with_env_vars({ "TRAVIS" => "foo", "CI_NAME" => "my_ci" }) do
+        with_env_vars("TRAVIS" => "foo", "CI_NAME" => "my_ci") do
           ci_part = fetcher.user_agent.split(" ").find {|x| x.match(%r{\Aci/}) }
           expect(ci_part).to match("travis")
           expect(ci_part).to match("my_ci")
diff --git a/spec/bundler/gem_helper_spec.rb b/spec/bundler/gem_helper_spec.rb
index ff41f04fb35..0dbd1d8e20e 100644
--- a/spec/bundler/gem_helper_spec.rb
+++ b/spec/bundler/gem_helper_spec.rb
@@ -103,9 +103,10 @@ def remove_push_guard(gemspec_content)
       end
 
       context "defines Rake tasks" do
-        let(:task_names) { %w[build install release
-                              release:guard_clean release:source_control_push
-                              release:rubygem_push] }
+        let(:task_names) {
+          %w[build install release release:guard_clean
+             release:source_control_push release:rubygem_push]
+        }
 
         context "before installation" do
           it "raises an error with appropriate message" do
diff --git a/spec/bundler/retry_spec.rb b/spec/bundler/retry_spec.rb
index 23e66684387..03f74cd5110 100644
--- a/spec/bundler/retry_spec.rb
+++ b/spec/bundler/retry_spec.rb
@@ -12,7 +12,7 @@
   end
 
   it "returns the first valid result" do
-    jobs = [Proc.new { raise "foo" }, Proc.new { :bar }, Proc.new { raise "foo" }]
+    jobs = [proc { raise "foo" }, proc { :bar }, proc { raise "foo" }]
     attempts = 0
     result = Bundler::Retry.new(nil, nil, 3).attempt do
       attempts += 1
diff --git a/spec/install/binstubs_spec.rb b/spec/install/binstubs_spec.rb
index 6442ad74cbf..1b34e62567b 100644
--- a/spec/install/binstubs_spec.rb
+++ b/spec/install/binstubs_spec.rb
@@ -5,7 +5,7 @@
     # On OS X, Gem.bindir defaults to /usr/bin, so system_bindir is useful if
     # you want to avoid sudo installs for system gems with OS X's default ruby
     it "overrides Gem.bindir" do
-      expect(Pathname.new("/usr/bin")).not_to be_writable unless Process::euid == 0
+      expect(Pathname.new("/usr/bin")).not_to be_writable unless Process.euid == 0
       gemfile <<-G
         require 'rubygems'
         def Gem.bindir; "/usr/bin"; end
diff --git a/spec/install/bundler_spec.rb b/spec/install/bundler_spec.rb
index 4bbfb135c12..a5278ef2f89 100644
--- a/spec/install/bundler_spec.rb
+++ b/spec/install/bundler_spec.rb
@@ -134,7 +134,6 @@
       G
 
       simulate_bundler_version "10.0.0"
-      #simulate_new_machine
 
       bundle "check"
       expect(out).to include("The Gemfile's dependencies are satisfied")
diff --git a/spec/install/gems/dependency_api_spec.rb b/spec/install/gems/dependency_api_spec.rb
index 97b1c6fc9e8..55eba014815 100644
--- a/spec/install/gems/dependency_api_spec.rb
+++ b/spec/install/gems/dependency_api_spec.rb
@@ -290,7 +290,7 @@ def require(*args)
     build_repo4 do
       build_gem "activesupport", "1.2.0"
       build_gem "somegem", "1.0.0" do |s|
-        s.add_dependency "activesupport", "1.2.3" #This version exists only in repo1
+        s.add_dependency "activesupport", "1.2.3" # This version exists only in repo1
       end
     end
 
diff --git a/spec/lock/lockfile_spec.rb b/spec/lock/lockfile_spec.rb
index 5204e86092f..bcca03983ce 100644
--- a/spec/lock/lockfile_spec.rb
+++ b/spec/lock/lockfile_spec.rb
@@ -1243,7 +1243,8 @@ def set_lockfile_mtime_to_known_value
 
     context "when nothing changes" do
       it "preserves Gemfile.lock \\n line endings" do
-        expect { ruby <<-RUBY
+        expect {
+          ruby <<-RUBY
                    require 'rubygems'
                    require 'bundler'
                    Bundler.setup
@@ -1256,7 +1257,8 @@ def set_lockfile_mtime_to_known_value
         File.open(bundled_app("Gemfile.lock"), "wb") {|f| f.puts(win_lock) }
         set_lockfile_mtime_to_known_value
 
-        expect { ruby <<-RUBY
+        expect {
+          ruby <<-RUBY
                    require 'rubygems'
                    require 'bundler'
                    Bundler.setup
diff --git a/spec/realworld/dependency_api_spec.rb b/spec/realworld/dependency_api_spec.rb
index dd03907093d..ac551992a88 100644
--- a/spec/realworld/dependency_api_spec.rb
+++ b/spec/realworld/dependency_api_spec.rb
@@ -19,7 +19,7 @@ def wait_for_server(port, seconds = 15)
       require "rack"
       ENV["GEM_HOME"] = old_gem_home
 
-      port = 21453
+      port = 21_453
       port += 1 while TCPSocket.new("127.0.0.1", port) rescue false
       @server_uri = "http://127.0.0.1:#{port}"
 
diff --git a/spec/runtime/executable_spec.rb b/spec/runtime/executable_spec.rb
index 4ddb330ae07..a0abee27f56 100644
--- a/spec/runtime/executable_spec.rb
+++ b/spec/runtime/executable_spec.rb
@@ -37,8 +37,8 @@
   end
 
   it "uses the default ruby install name when shebang is not specified" do
-   bundle "install --binstubs"
-   expect(File.open("bin/rackup").gets).to eq("#!/usr/bin/env #{RbConfig::CONFIG["ruby_install_name"]}\n")
+    bundle "install --binstubs"
+    expect(File.open("bin/rackup").gets).to eq("#!/usr/bin/env #{RbConfig::CONFIG["ruby_install_name"]}\n")
   end
 
   it "allows the name of the shebang executable to be specified" do
@@ -105,7 +105,6 @@
     bundle "install --binstubs \"\""
 
     expect(bundled_app("bin/rackup")).not_to exist
-    #expect(bundled_app("rackup")).not_to exist
 
     bundle "config bin"
     expect(out).to include("You have not configured a value for `bin`")
diff --git a/spec/runtime/load_spec.rb b/spec/runtime/load_spec.rb
index 1ba79adc851..950e8e9b18a 100644
--- a/spec/runtime/load_spec.rb
+++ b/spec/runtime/load_spec.rb
@@ -32,7 +32,7 @@
       expect {
         ENV["BUNDLE_GEMFILE"] = ""
         Bundler.load
-      }.not_to raise_error()
+      }.not_to raise_error
     end
   end
 
diff --git a/spec/runtime/with_clean_env_spec.rb b/spec/runtime/with_clean_env_spec.rb
index 1c6114c0334..13dd629a166 100644
--- a/spec/runtime/with_clean_env_spec.rb
+++ b/spec/runtime/with_clean_env_spec.rb
@@ -27,8 +27,8 @@
       gemfile ""
       bundle "install --path vendor/bundle"
 
-      code = "Bundler.with_clean_env do;" +
-             "  print ENV['GEM_PATH'] != '';" +
+      code = "Bundler.with_clean_env do;" \
+             "  print ENV['GEM_PATH'] != '';" \
              "end"
 
       result = bundle "exec ruby -e #{code.inspect}"
diff --git a/spec/support/builders.rb b/spec/support/builders.rb
index b5e044b67dd..2c02327b3d4 100644
--- a/spec/support/builders.rb
+++ b/spec/support/builders.rb
@@ -293,7 +293,6 @@ def build_security_repo
           s.cert_chain = [cert]
         end
       end
-
     end
 
     def build_repo(path, &blk)
diff --git a/spec/support/indexes.rb b/spec/support/indexes.rb
index dff5138733e..387d100d360 100644
--- a/spec/support/indexes.rb
+++ b/spec/support/indexes.rb
@@ -38,12 +38,10 @@ def should_resolve_and_include(specs)
     end
 
     def should_conflict_on(names)
-      begin
-        got = resolve
-        flunk "The resolve succeeded with: #{got.map(&:full_name).sort.inspect}"
-      rescue Bundler::VersionConflict => e
-        expect(Array(names).sort).to eq(e.conflicts.sort)
-      end
+      got = resolve
+      flunk "The resolve succeeded with: #{got.map(&:full_name).sort.inspect}"
+    rescue Bundler::VersionConflict => e
+      expect(Array(names).sort).to eq(e.conflicts.sort)
     end
 
     def gem(*args, &blk)
diff --git a/spec/support/matchers.rb b/spec/support/matchers.rb
index d41ac964f5e..6c585ddae4e 100644
--- a/spec/support/matchers.rb
+++ b/spec/support/matchers.rb
@@ -18,8 +18,6 @@ module Matchers
       args = args.flatten
       args = args.first.split(/\s+/) if args.size == 1
 
-      #failure_message_for_should "Expected RUBYOPT to have options #{args.join(" ")}. It was #{ENV["RUBYOPT"]}"
-
       match do |actual|
         actual = actual.split(/\s+/) if actual.is_a?(String)
         args.all? {|arg| actual.include?(arg) } && actual.uniq.size == actual.size
diff --git a/spec/support/ruby_ext.rb b/spec/support/ruby_ext.rb
index b70fb7bf829..59f428aa11c 100644
--- a/spec/support/ruby_ext.rb
+++ b/spec/support/ruby_ext.rb
@@ -1,5 +1,5 @@
 class IO
-  def read_available_bytes(chunk_size = 16384, select_timeout = 0.02)
+  def read_available_bytes(chunk_size = 16_384, select_timeout = 0.02)
     buffer = []
 
     return "" if closed? || eof?
@@ -15,6 +15,6 @@ def read_available_bytes(chunk_size = 16384, select_timeout = 0.02)
       end
     end
 
-    return buffer.join
+    buffer.join
   end
 end
diff --git a/spec/support/rubygems_ext.rb b/spec/support/rubygems_ext.rb
index 8456de163f2..1e0d3d5ee02 100644
--- a/spec/support/rubygems_ext.rb
+++ b/spec/support/rubygems_ext.rb
@@ -42,7 +42,7 @@ def gem_command(command, args = "", options = {})
         args = %["#{args}"]
       end
       lib = File.join(File.dirname(__FILE__), "..", "..", "lib")
-      %x{#{Gem.ruby} -I#{lib} -rubygems -S gem --backtrace #{command} #{args}}.strip
+      `#{Gem.ruby} -I#{lib} -rubygems -S gem --backtrace #{command} #{args}`.strip
     end
 
   end
diff --git a/spec/support/sometimes.rb b/spec/support/sometimes.rb
index 99fc9e9444e..0ab15d974f0 100644
--- a/spec/support/sometimes.rb
+++ b/spec/support/sometimes.rb
@@ -29,7 +29,7 @@ def run_with_retries(example_to_run, retries)
   end
 
   config.after(:suite) do
-    message = Proc.new do |color, text|
+    message = proc do |color, text|
       colored = RSpec::Core::Formatters::ConsoleCodes.wrap(text, color)
       notification = RSpec::Core::Notifications::MessageNotification.new(colored)
       RSpec.configuration.formatters.first.message(notification)