diff --git a/lib/jekyll/converters/markdown/redcarpet_parser.rb b/lib/jekyll/converters/markdown/redcarpet_parser.rb
index 79133a2a..8e759385 100644
--- a/lib/jekyll/converters/markdown/redcarpet_parser.rb
+++ b/lib/jekyll/converters/markdown/redcarpet_parser.rb
@@ -1,102 +1,108 @@
-module Jekyll
-  module Converters
-    class Markdown
-      class RedcarpetParser
-        module CommonMethods
-          def add_code_tags(code, lang)
-            code = code.to_s
-            code = code.sub(/<pre>/, "<pre><code class=\"language-#{lang}\" data-lang=\"#{lang}\">")
-            code = code.sub(/<\/pre>/, "</code></pre>")
-            code
-          end
+class Jekyll::Converters::Markdown::RedcarpetParser
+  module CommonMethods
+    def add_code_tags(code, lang)
+      code = code.to_s
+      code = code.sub(
+        /<pre>/,
+        "<pre><code class=\"language-#{lang}\" data-lang=\"#{lang}\">"
+      )
+      code = code.sub(%r!</pre>!, "</code></pre>")
+      code
+    end
+  end
+
+  module WithPygments
+    include CommonMethods
+    def block_code(code, lang)
+      Jekyll::External.require_with_graceful_fail("pygments")
+      lang = lang && lang.split.first || "text"
+      add_code_tags(
+        Pygments.highlight(
+          code,
+          {
+            :lexer   => lang,
+            :options => { :encoding => "utf-8" }
+          }
+        ),
+        lang
+      )
+    end
+  end
+
+  module WithoutHighlighting
+    require "cgi"
+
+    include CommonMethods
+
+    def code_wrap(code)
+      "<figure class=\"highlight\"><pre>#{CGI.escapeHTML(code)}</pre></figure>"
+    end
+
+    def block_code(code, lang)
+      lang = lang && lang.split.first || "text"
+      add_code_tags(code_wrap(code), lang)
+    end
+  end
+
+  module WithRouge
+    def block_code(code, lang)
+      code = "<pre>#{super}</pre>"
+
+      output = "<div class=\"highlight\">"
+      output << add_code_tags(code, lang)
+      output << "</div>"
+    end
+
+    protected
+    def rouge_formatter(_lexer)
+      Rouge::Formatters::HTML.new(:wrap => false)
+    end
+  end
+
+  def initialize(config)
+    Jekyll::External.require_with_graceful_fail("redcarpet")
+    @config = config
+    @redcarpet_extensions = {}
+    @config["redcarpet"]["extensions"].each do |e|
+      @redcarpet_extensions[e.to_sym] = true
+    end
+
+    @renderer ||= class_with_proper_highlighter(@config["highlighter"])
+  end
+
+  def class_with_proper_highlighter(highlighter)
+    Class.new(Redcarpet::Render::HTML) do
+      case highlighter
+      when "pygments"
+        include WithPygments
+      when "rouge"
+        Jekyll::External.require_with_graceful_fail(%w(
+          rouge rouge/plugins/redcarpet
+        ))
+
+        unless Gem::Version.new(Rouge.version) > Gem::Version.new("1.3.0")
+          abort "Please install Rouge 1.3.0 or greater and try running Jekyll again."
         end
 
-        module WithPygments
-          include CommonMethods
-          def block_code(code, lang)
-            Jekyll::External.require_with_graceful_fail("pygments")
-            lang = lang && lang.split.first || "text"
-            add_code_tags(
-              Pygments.highlight(code, :lexer => lang, :options => { :encoding => 'utf-8' }),
-              lang
-            )
-          end
-        end
-
-        module WithoutHighlighting
-          require 'cgi'
-
-          include CommonMethods
-
-          def code_wrap(code)
-            "<figure class=\"highlight\"><pre>#{CGI::escapeHTML(code)}</pre></figure>"
-          end
-
-          def block_code(code, lang)
-            lang = lang && lang.split.first || "text"
-            add_code_tags(code_wrap(code), lang)
-          end
-        end
-
-        module WithRouge
-          def block_code(code, lang)
-            code = "<pre>#{super}</pre>"
-
-            output = "<div class=\"highlight\">"
-            output << add_code_tags(code, lang)
-            output << "</div>"
-          end
-
-          protected
-          def rouge_formatter(_lexer)
-            Rouge::Formatters::HTML.new(:wrap => false)
-          end
-        end
-
-        def initialize(config)
-          External.require_with_graceful_fail("redcarpet")
-          @config = config
-          @redcarpet_extensions = {}
-          @config['redcarpet']['extensions'].each { |e| @redcarpet_extensions[e.to_sym] = true }
-
-          @renderer ||= class_with_proper_highlighter(@config['highlighter'])
-        end
-
-        def class_with_proper_highlighter(highlighter)
-          case highlighter
-          when "pygments"
-            Class.new(Redcarpet::Render::HTML) do
-              include WithPygments
-            end
-          when "rouge"
-            Class.new(Redcarpet::Render::HTML) do
-              Jekyll::External.require_with_graceful_fail(%w(
-                rouge
-                rouge/plugins/redcarpet
-              ))
-
-              unless Gem::Version.new(Rouge.version) > Gem::Version.new("1.3.0")
-                abort "Please install Rouge 1.3.0 or greater and try running Jekyll again."
-              end
-
-              include Rouge::Plugins::Redcarpet
-              include CommonMethods
-              include WithRouge
-            end
-          else
-            Class.new(Redcarpet::Render::HTML) do
-              include WithoutHighlighting
-            end
-          end
-        end
-
-        def convert(content)
-          @redcarpet_extensions[:fenced_code_blocks] = !@redcarpet_extensions[:no_fenced_code_blocks]
-          @renderer.send :include, Redcarpet::Render::SmartyPants if @redcarpet_extensions[:smart]
-          markdown = Redcarpet::Markdown.new(@renderer.new(@redcarpet_extensions), @redcarpet_extensions)
-          markdown.render(content)
-        end
+        include Rouge::Plugins::Redcarpet
+        include CommonMethods
+        include WithRouge
+      else
+        include WithoutHighlighting
       end
     end
   end
+
+  def convert(content)
+    @redcarpet_extensions[:fenced_code_blocks] = \
+      !@redcarpet_extensions[:no_fenced_code_blocks]
+    if @redcarpet_extensions[:smart]
+      @renderer.send :include, Redcarpet::Render::SmartyPants
+    end
+    markdown = Redcarpet::Markdown.new(
+      @renderer.new(@redcarpet_extensions),
+      @redcarpet_extensions
+    )
+    markdown.render(content)
+  end
 end