follow up #1225

sinatra-contrib/lib/sinatra/content_for.rb

@@ -129,11 +129,9 @@ module ContentFor
     # Your blocks can also receive values, which are passed to them
     # by <tt>yield_content</tt>
     def content_for(key, value = nil, options = {}, &block)
-      key = key.to_sym
-
       block ||= proc { |*| value }
       clear_content_for(key) if options[:flush]
-      content_blocks[key] << capture_later(&block)
+      content_blocks[key.to_sym] << capture_later(&block)
     end
 
     # Check if a block of content with the given key was defined. For
@@ -175,11 +173,10 @@ def clear_content_for(key)
     # Would pass <tt>1</tt> and <tt>2</tt> to all the blocks registered
     # for <tt>:head</tt>.
     def yield_content(key, *args, &block)
-      key = key.to_sym
       if block_given? && !content_for?(key)
         haml? ? capture_haml(*args, &block) : yield(*args)
       else
-        content = content_blocks[key].map { |b| capture(*args, &b) }
+        content = content_blocks[key.to_sym].map { |b| capture(*args, &b) }
         content.join.tap do |c|
           if block_given? && (erb? || erubi? || erubis?)
             @_out_buf << c