diff -r 6517bf8e50d0 -r c46e0c9940d6 src/share/classes/com/sun/tools/doclets/formats/html/AbstractMemberWriter.java
--- a/src/share/classes/com/sun/tools/doclets/formats/html/AbstractMemberWriter.java	Wed Oct 10 18:34:46 2012 -0700
+++ b/src/share/classes/com/sun/tools/doclets/formats/html/AbstractMemberWriter.java	Wed Oct 10 18:44:21 2012 -0700
@@ -263,7 +263,7 @@
         if (len <= 0) {
             return "";
         }
-        StringBuffer sb = new StringBuffer(len);
+        StringBuilder sb = new StringBuilder(len);
         for(int i = 0; i < len; i++) {
             sb.append(' ');
     }