Fix rubocop warnings

Guardfile

@@ -4,8 +4,8 @@ guard 'bundler' do
 end
 
 guard :rspec, :cli => '-fs --color --order rand' do
-  watch(/^spec\/.+_spec\.rb$/)
-  watch(/^lib\/(.+)\.rb$/)     { |m| "spec/lib/#{m[1]}_spec.rb" }
+  watch(%r{^spec/.+_spec\.rb$})
+  watch(%r{^lib/(.+)\.rb$})    { |m| "spec/lib/#{m[1]}_spec.rb" }
   watch('spec/spec_helper.rb') { 'spec' }
 end
 

lib/naught/null_class_builder/commands/traceable.rb

@@ -12,7 +12,7 @@ def call
               def initialize(options = {})
                 range = (RUBY_VERSION.to_f == 1.9 && RUBY_PLATFORM != 'java') ? 4 : 3
                 backtrace = options.fetch(:caller) { Kernel.caller(range) }
-                @__file__, line, _ = backtrace[0].split(':')
+                @__file__, line, = backtrace[0].split(':')
                 @__line__ = line.to_i
               end
             end

naught.gemspec

@@ -14,8 +14,8 @@ Gem::Specification.new do |spec|
   spec.license       = 'MIT'
 
   spec.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
-  spec.executables   = spec.files.grep(/^bin\//) { |f| File.basename(f) }
-  spec.test_files    = spec.files.grep(/^(test|spec|features)\//)
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
   spec.add_development_dependency 'bundler', '~> 1.3'

spec/functions/maybe_spec.rb

@@ -23,7 +23,8 @@
   end
 
   it 'generates null objects with useful trace info' do
-    null, line = Maybe(), __LINE__
+    null = Maybe()
+    line = __LINE__
     expect(null.__file__).to eq(__FILE__)
     expect(null.__line__).to eq(line)
   end

spec/functions/null_spec.rb

@@ -26,7 +26,8 @@
   end
 
   it 'generates null objects with useful trace info' do
-    null, line = Null(), __LINE__
+    null = Null()
+    line = __LINE__
     expect(null.__file__).to eq(__FILE__)
     expect(null.__line__).to eq(line)
   end

spec/naught_spec.rb

@@ -31,7 +31,8 @@ class Point
     null_object_and_line.first
   end
   let(:null_object_and_line) do
-    obj, line = trace_null_class.new, __LINE__
+    obj = trace_null_class.new
+    line = __LINE__
     [obj, line]
   end
   let(:instantiation_line) { null_object_and_line.last }
@@ -52,7 +53,8 @@ def make_null
   end
 
   it 'can accept custom backtrace info' do
-    obj, line = make_null, __LINE__
+    obj = make_null
+    line = __LINE__
     expect(obj.__line__).to eq(line)
   end
 end