8204229: Formatter and String.format ignore the width with the percent modifier (%5%)

Reviewed-by: jlaskey

src/java.base/share/classes/java/util/Formatter.java

@@ -2914,7 +2914,7 @@ public final class Formatter implements Closeable, Flushable {
                 a.append(System.lineSeparator());
                 break;
             case Conversion.PERCENT_SIGN:
-                a.append('%');
+                print("%", l);
                 break;
             default:
                 assert false;