diff --git a/Library/Homebrew/extend/module.rb b/Library/Homebrew/extend/module.rb
index 173bfcc385..8ce9075149 100644
--- a/Library/Homebrew/extend/module.rb
+++ b/Library/Homebrew/extend/module.rb
@@ -8,11 +8,11 @@ class Module
 
     attrs.each do |attr|
       module_eval <<-EOS, file, line
-        def #{attr}(val=nil)
-          @#{attr} ||= nil
-          return @#{attr} if val.nil?
-          @#{attr} = val
-        end
+        def #{attr}(val=nil)           # def prefix(val=nil)
+          @#{attr} ||= nil             #   @prefix ||= nil
+          return @#{attr} if val.nil?  #   return @prefix if val.nil?
+          @#{attr} = val               #   @prefix = val
+        end                            # end
       EOS
     end
   end
diff --git a/Library/Homebrew/rubocops/cask/ast/stanza.rb b/Library/Homebrew/rubocops/cask/ast/stanza.rb
index 85f0de5cc3..e17e849e74 100644
--- a/Library/Homebrew/rubocops/cask/ast/stanza.rb
+++ b/Library/Homebrew/rubocops/cask/ast/stanza.rb
@@ -58,9 +58,9 @@ module RuboCop
 
         Constants::STANZA_ORDER.each do |stanza_name|
           class_eval <<-RUBY, __FILE__, __LINE__ + 1
-            def #{stanza_name}?
-              stanza_name == :#{stanza_name}
-            end
+            def #{stanza_name}?               # def url?
+              stanza_name == :#{stanza_name}  #   stanza_name == :url
+            end                               # end
           RUBY
         end
       end
diff --git a/Library/Homebrew/test/support/helper/output_as_tty.rb b/Library/Homebrew/test/support/helper/output_as_tty.rb
index 24b25fd89f..1e1dea10da 100644
--- a/Library/Homebrew/test/support/helper/output_as_tty.rb
+++ b/Library/Homebrew/test/support/helper/output_as_tty.rb
@@ -22,7 +22,7 @@ module Test
           return super(block) unless @tty
 
           colored_tty_block = lambda do
-            instance_eval("$#{@output}", __FILE__, __LINE__).extend(Module.new do
+            instance_eval("$#{@output}  # $stdout", __FILE__, __LINE__).extend(Module.new do
               def tty?
                 true
               end
@@ -36,17 +36,17 @@ module Test
 
           uncolored_tty_block = lambda do
             instance_eval <<-EOS, __FILE__, __LINE__ + 1
-              begin
-                captured_stream = StringIO.new
+              begin                                                       # begin
+                captured_stream = StringIO.new                            #   captured_stream = StringIO.new
 
-                original_stream = $#{@output}
-                $#{@output} = captured_stream
+                original_stream = $#{@output}                             #   original_stream = $stdout
+                $#{@output} = captured_stream                             #   $stdout = captured_stream
 
-                colored_tty_block.call
-              ensure
-                $#{@output} = original_stream
-                $#{@output}.print Tty.strip_ansi(captured_stream.string)
-              end
+                colored_tty_block.call                                    #   colored_tty_block.call
+              ensure                                                      # ensure
+                $#{@output} = original_stream                             #   $stdout = original_stream
+                $#{@output}.print Tty.strip_ansi(captured_stream.string)  #   $stdout.print Tty.strip_ansi(captured_stream.string)
+              end                                                         # end
             EOS
           end