Updating the emitter to handle combinators. All tests pass again.

node.cpp

@@ -80,7 +80,8 @@ namespace Sass {
       if (prefixes.empty()) {
         new_prefixes.reserve(sel_group.children->size());
         for (int i = 0; i < sel_group.children->size(); ++i) {
-          new_prefixes.push_back(string(sel_group.children->at(i).token));
+          // new_prefixes.push_back(string(sel_group.children->at(i).token));
+          new_prefixes.push_back(string(sel_group.children->at(i)));
         }
       }
       else {
@@ -89,7 +90,7 @@ namespace Sass {
           for (int j = 0; j < sel_group.children->size(); ++j) {
             new_prefixes.push_back(prefixes[i] +
                                    ' ' +
-                                   string(sel_group.children->at(j).token));
+                                   string(sel_group.children->at(j)));
           }
         }
       }

node.hpp

@@ -119,6 +119,23 @@ namespace Sass {
       return *this;
     }
     
+    operator string() {
+      if (type == selector) {
+        string result(string(children->at(0)));
+        for (int i = 1; i < children->size(); ++i) {
+          result += string(children->at(i));
+        }
+        return result;
+      }
+      else if (type == selector_combinator) {
+        if (std::isspace(token.begin[0])) return string(" ");
+        else return string(" ") += string(token) += string(" ");
+      }
+      else {
+        return string(token);
+      }
+    }
+    
     void release() const { children = 0; }
     
     void echo(stringstream& buf, size_t depth = 0);