--- old/src/java.base/share/classes/java/security/cert/PolicyQualifierInfo.java	2014-08-26 11:20:30.000000000 +0800
+++ new/src/java.base/share/classes/java/security/cert/PolicyQualifierInfo.java	2014-08-26 11:20:30.000000000 +0800
@@ -158,15 +158,17 @@
      *         {@code PolicyQualifierInfo}
      */
     public String toString() {
-        if (pqiString != null)
+        if (pqiString != null) {
             return pqiString;
+        }
         HexDumpEncoder enc = new HexDumpEncoder();
         StringBuilder sb = new StringBuilder();
         sb.append("PolicyQualifierInfo: [\n");
-        sb.append("  qualifierID: " + mId + "\n");
-        sb.append("  qualifier: " +
-            (mData == null ? "null" : enc.encodeBuffer(mData)) + "\n");
-        sb.append("]");
+        sb.append("  qualifierID: ").append(mId).append('\n');
+        sb.append("  qualifier: ")
+                .append(mData == null ? "null" : enc.encodeBuffer(mData))
+                .append('\n');
+        sb.append(']');
         pqiString = sb.toString();
         return pqiString;
     }