5076980: (fmt) FormattableFlags specifies unsupported '^' format flag

Summary: replaced '^' with 'S' in spec
Reviewed-by: darcy

src/share/classes/java/util/FormattableFlags.java

@@ -59,10 +59,10 @@ public class FormattableFlags {
      * <pre>
      *     out.toUpperCase() </pre>
      *
-     * <p> This flag corresponds to <tt>'^'</tt> (<tt>'&#92;u005e'</tt>) in
+     * <p> This flag corresponds to <tt>'S'</tt> (<tt>'&#92;u0053'</tt>) in
      * the format specifier.
      */
-    public static final int UPPERCASE = 1<<1;    // '^'
+    public static final int UPPERCASE = 1<<1;    // 'S'
 
     /**
      * Requires the output to use an alternate form.  The definition of the