Cleaning up the new selector expander & emitter. All tests pass again.

document.cpp

@@ -108,7 +108,7 @@ namespace Sass {
       root.echo(output);
       break;
     case nested:
-      root.emit_nested_css(output, 0);
+      root.emit_nested_css(output, 0, true);
       break;
     case expanded:
       root.emit_expanded_css(output, "");

node.hpp

@@ -199,7 +199,7 @@ namespace Sass {
     bool operator>=(Node rhs) const;
 
     string to_string() const;
-    void emit_nested_css(stringstream& buf, size_t depth);
+    void emit_nested_css(stringstream& buf, size_t depth, bool at_toplevel = false);
     void emit_propset(stringstream& buf, size_t depth, const string& prefix);
     void echo(stringstream& buf, size_t depth = 0);
     void emit_expanded_css(stringstream& buf, const string& prefix);

node_emitters.cpp

@@ -295,14 +295,14 @@ namespace Sass {
     }
   }
 
-  void Node::emit_nested_css(stringstream& buf, size_t depth)
+  void Node::emit_nested_css(stringstream& buf, size_t depth, bool at_toplevel)
   {
     switch (type())
     {
       case root:
         if (has_expansions()) flatten();
         for (size_t i = 0, S = size(); i < S; ++i) {
-          at(i).emit_nested_css(buf, depth);
+          at(i).emit_nested_css(buf, depth, true);
         }
         break;
 
@@ -332,7 +332,7 @@ namespace Sass {
           }
         }
         if (block.has_statements()) --depth; // see previous comment
-        if (depth == 0) buf << endl;
+        if ((depth == 0) && at_toplevel) buf << endl;
       } break;
 
       case propset: {