src/jdk.runtime/share/classes/sun/security/tools/policytool/PolicyTool.java

rev 10552 : 8055723[core]: Replace concat String to append in StringBuilder parameters
Contributed-by: Otavio Santana <otaviojava@java.net>

@@ -978,12 +978,13 @@
             StringBuilder sb = new StringBuilder(200);
             ListIterator<PolicyParser.PrincipalEntry> list =
                                 grantEntry.principals.listIterator();
             while (list.hasNext()) {
                 PolicyParser.PrincipalEntry pppe = list.next();
-                sb.append(" Principal " + pppe.getDisplayClass() + " " +
-                    pppe.getDisplayName(true));
+                sb.append(" Principal ").append(pppe.getDisplayClass())
+                        .append(' ')
+                        .append(pppe.getDisplayName(true));
                 if (list.hasNext()) sb.append(", ");
             }
             result = sb.toString();
         }
         return result;