0
@@ -121,6 +121,7 @@ module Sass
0
       expand_commas root
0
       nest_rules    root
0
       flatten_rules root
0
+      fold_commas   root
0
       root
0
     end
0
 
0
@@ -284,5 +285,36 @@ module Sass
0
 
0
       flatten_rules(rule)
0
     end
0
+
0
+    # Transform
0
+    #
0
+    #   foo
0
+    #     bar
0
+    #       color: blue
0
+    #     baz
0
+    #       color: blue
0
+    #
0
+    # into
0
+    #
0
+    #   foo
0
+    #     bar, baz
0
+    #       color: blue
0
+    #
0
+    def fold_commas(root)
0
+      prev_rule = nil
0
+      root.children.map! do |child|
0
+        next child unless Tree::RuleNode === child
0
+
0
+        if prev_rule && prev_rule.children == child.children
0
+          prev_rule.rule << ", #{child.rule}"
0
+          next nil
0
+        end
0
+
0
+        fold_commas(child)
0
+        prev_rule = child
0
+        child
0
+      end
0
+      root.children.compact!
0
+    end
0
   end
0
 end