Fix a guard style inconsistency in regexp-stack.h.

Two spaces before the endif guard comment.

Review URL: http://codereview.chromium.org/99363


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1847 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/regexp-stack.h

@@ -103,4 +103,4 @@ class RegExpStack {
 
 }}  // namespace v8::internal
 
-#endif // V8_REGEXP_STACK_H_
+#endif  // V8_REGEXP_STACK_H_