gn: handle continued suffix comments

tools/gn/parser.cc

Index: tools/gn/parser.cc
diff --git a/tools/gn/parser.cc b/tools/gn/parser.cc
index c99282f2b0fb36ade03ffb5c439634a7e8f75ef5..b1b310f73ebe82279b532e24457c268be272b7b1 100644
--- a/tools/gn/parser.cc
+++ b/tools/gn/parser.cc
@@ -550,7 +550,7 @@ void Parser::AssignComments(ParseNode* file) {
     const Location& start = (*i)->GetRange().begin();
     while (cur_comment < static_cast<int>(line_comment_tokens_.size())) {
       if (start.byte() >= line_comment_tokens_[cur_comment].location().byte()) {
-        const_cast<ParseNode*>((*i))->comments_mutable()->append_before(
+        const_cast<ParseNode*>(*i)->comments_mutable()->append_before(
             line_comment_tokens_[cur_comment]);
         ++cur_comment;
       } else {
@@ -589,12 +589,16 @@ void Parser::AssignComments(ParseNode* file) {
 
     while (cur_comment >= 0) {
       if (end.byte() <= suffix_comment_tokens_[cur_comment].location().byte()) {
-        const_cast<ParseNode*>((*i))->comments_mutable()->append_suffix(
+        const_cast<ParseNode*>(*i)->comments_mutable()->append_suffix(
             suffix_comment_tokens_[cur_comment]);
         --cur_comment;
       } else {
         break;
       }
     }
+
+    // Suffix comments were assigned in reverse, so if there were multiple on
+    // the same node, they need to be reversed.
+    const_cast<ParseNode*>(*i)->comments_mutable()->ReverseSuffix();
   }
 }