Fix some operator output in to_sass.

doc-src/lib/stylesheets/sass_extensions.rb

@@ -54,7 +54,7 @@ module Sass
     class CommentNode < Node
       def to_sass
         comment = silent ? "//" : "/*"
-        comment << value
+        comment << " " << value
         lines.each do |line|
           comment << "  " << line
         end
@@ -207,7 +207,7 @@ module Sass
           :plus => ' + ',
           :minus => ' - ',
           :div => ' / ',
-          :mult => '*',
+          :times => ' * ',
           :comma => ', ',
           :concat => ' ',
           :neq => ' ! =',
@@ -233,8 +233,13 @@ module Sass
       end
     end
     class UnaryOperation < Node
+      OPERATORS_TO_SASS = {
+        :minus => "-",
+        :div   => "/",
+        :not   => "not "
+      }
       def to_sass(format = :text)
-        "#{@operator}#{@operand}"
+        "#{OPERATORS_TO_SASS[@operator]}#{@operand.to_sass}"
       end
     end
     class Variable < Node