fix multiline selectors and tidy up group selector output

* all multiline selectors are now outputed in one line
* grouped selectors now honor :style => 'compressed'

lib/sass/engine.rb

@@ -138,6 +138,15 @@ module Sass
           if tabs - old_tabs > 1
             raise SyntaxError.new("Illegal Indentation: Only two space characters are allowed as tabulation.", @line)
           end
+          line.strip!
+          next_line = @template[index+1]
+          if next_line
+            next_tabs = count_tabs(next_line)
+            if line[-1] == ?, && tabs == next_tabs
+              @template[index+1] = "#{'  '*tabs}#{line} #{next_line.strip}"
+              next
+            end
+          end
           @lines << [line.strip, tabs]
 
           old_tabs = tabs

lib/sass/tree/rule_node.rb

@@ -20,20 +20,22 @@ module Sass::Tree
       # Save this because the comma's removed by the super_rule additions
       was_continued = continued?
 
+      rule_split = /\s*,\s*/
+      rule_separator = @style == :compressed ? ',' : ', '
       total_rule = if super_rules
-        super_rules.split(/,\s*/).collect! do |s|
-          self.rule.split(/,\s*/).collect do |r|
+        super_rules.split(rule_split).collect! do |s|
+          self.rule.split(rule_split).collect do |r|
             if r.include?(PARENT)
               r.gsub(PARENT, s)
             else
               "#{s} #{r}"
             end
-          end.join(", ")
-        end.join(", ") + (was_continued ? ',' : '')
+          end.join(rule_separator)
+        end.join(rule_separator) + (was_continued ? rule_separator: "")
       elsif self.rule.include?(PARENT)
         raise Sass::SyntaxError.new("Base-level rules cannot contain the parent-selector-referencing character '#{PARENT}'", line)
       else
-        self.rule
+        self.rule.gsub(rule_split, rule_separator)
       end
       
       children.each do |child|

test/sass/engine_test.rb

@@ -109,9 +109,9 @@ class SassEngineTest < Test::Unit::TestCase
   end
 
   def test_basic_multiline_selector
-    assert_equal("#foo #bar,\n#baz #boom {\n  foo: bar; }\n",
+    assert_equal("#foo #bar, #baz #boom {\n  foo: bar; }\n",
                  render("#foo #bar,\n#baz #boom\n  :foo bar"))
-    assert_equal("#foo #bar,\n#foo #baz {\n  foo: bar; }\n",
+    assert_equal("#foo #bar, #foo #baz {\n  foo: bar; }\n",
                  render("#foo\n  #bar,\n  #baz\n    :foo bar"))
     assert_equal("#foo #bar, #baz #boom { foo: bar; }\n",
                  render("#foo #bar,\n#baz #boom\n  :foo bar", :style => :compact))
@@ -179,11 +179,11 @@ class SassEngineTest < Test::Unit::TestCase
     assert_equal("@a{#b{a:b}#b #c{d:e}}\n",
                  render("@a\n  #b\n    :a b\n    #c\n      :d e", :style => :compressed))
                  
-    assert_equal("@a {\n  #foo,\n  #bar {\n    b: c; } }\n",
+    assert_equal("@a {\n  #foo, #bar {\n    b: c; } }\n",
                  render("@a\n  #foo, \n  #bar\n    :b c"))
     assert_equal("@a { #foo, #bar { b: c; } }\n",
                  render("@a\n  #foo, \n  #bar\n    :b c", :style => :compact))
-    assert_equal("@a {\n  #foo,\n  #bar {\n    b: c;\n  }\n}\n",
+    assert_equal("@a {\n  #foo, #bar {\n    b: c;\n  }\n}\n",
                  render("@a\n  #foo, \n  #bar\n    :b c", :style => :expanded))
     assert_equal("@a{#foo,#bar{b:c}}\n",
                  render("@a\n  #foo, \n  #bar\n    :b c", :style => :compressed))

test/sass/results/multiline.css

@@ -1,11 +1,6 @@
-#main,
-#header {
+#main, #header {
   height: 50px; }
-  #main div,
-  #header div {
+  #main div, #header div {
     width: 100px; }
-    #main div a span,
-    #main div em span,
-    #header div a span,
-    #header div em span {
+    #main div a span, #main div em span, #header div a span, #header div em span {
       color: pink; }