[Sass] Retrofit some comment parsing and tests to fit the new comment stuff.

lib/sass/engine.rb

@@ -524,9 +524,15 @@ WARNING
 
     def format_comment_text(text)
       content = text.split("\n")
+
+      if content.first && content.first.strip.empty?
+        removed_first = true
+        content.shift
+      end
+
       return "/* */" if content.empty?
       content.map! {|l| (l.empty? ? "" : " ") + l}
-      content.first.gsub!(/^ /, '')
+      content.first.gsub!(/^ /, '') unless removed_first
       content.last.gsub!(%r{ ?\*/ *$}, '')
       "/*" + content.join("\n *") + " */"
     end

test/sass/css2sass_test.rb

@@ -117,8 +117,8 @@ span.turkey
 
 #overhere
   bored: sorta
-  /*               it's for a good
-    cause
+  /*                  it's for a good
+     cause
   better_than: thread_pools
 
 #one_more

test/sass/engine_test.rb

@@ -1077,7 +1077,7 @@ SOURCE
 RESULT
 .box
   :border
-    /*:color black
+    /* :color black
     :style solid
 SOURCE