Fix RuboCop warnings

Address some RuboCop warnings and rename a method to have a clearer
name.

Author: sds

lib/overcommit/hook_runner.rb

@@ -51,7 +51,7 @@ def run
 
     attr_reader :log
 
-    def run_hooks
+    def run_hooks # rubocop:disable Metrics/MethodLength
       if @hooks.any?(&:enabled?)
         @printer.start_run
 
@@ -78,7 +78,7 @@ def run_hooks
 
         if hook_failed
           message = @context.post_fail_message
-          @printer.after(message) unless message.nil?
+          @printer.hook_run_failed(message) unless message.nil?
         end
 
         !hook_failed

lib/overcommit/printer.rb

@@ -75,7 +75,7 @@ def run_succeeded
       end
     end
 
-    def after(message)
+    def hook_run_failed(message)
       log.newline
       log.log message
       log.newline
@@ -131,9 +131,7 @@ def synchronize_all_methods
         self.class.__send__(:alias_method, old_method, method_name)
 
         self.class.send(:define_method, new_method) do |*args|
-          @lock.synchronize do
-            __send__(old_method, *args)
-          end
+          @lock.synchronize { __send__(old_method, *args) }
         end
 
         self.class.__send__(:alias_method, method_name, new_method)