[Compass Core] Fixed the append_selector function to allow comma-delimited selectors for both arguments instead of just the first.

TODO.md

@@ -0,0 +1,2 @@
+* vendored plugins should override default plugins.
+

lib/compass/installers/template_context.rb

@@ -0,0 +1,22 @@
+module Compass
+  module Installers
+    class TemplateContext
+      def self.ctx(*arguments)
+        new(*arguments).get_binding
+      end
+      def initialize(locals = {})
+        @locals = locals
+      end
+      def get_binding
+        @locals.each do |k, v|
+          eval("#{k} = v")
+        end
+        binding
+      end
+      def config
+        Compass.configuration
+      end
+      alias configuration config
+    end
+  end
+end

lib/compass/sass_extensions/functions/selectors.rb

@@ -33,7 +33,10 @@ module Compass::SassExtensions::Functions::Selectors
   #   #{append_selector(!selector, !to_append)}
   #     width: 2px
   def append_selector(selector, to_append)
-    Sass::Script::String.new(selector.value.split(COMMA_SEPARATOR).map{|s| "#{s}#{to_append}"}.join(", "))
+    ancestors = selector.value.split(COMMA_SEPARATOR)
+    descendants = to_append.value.split(COMMA_SEPARATOR)
+    nested = ancestors.map{|a| descendants.map{|d| "#{a}#{d}"}.join(", ")}.join(", ")
+    Sass::Script::String.new(nested)
   end
 
 end