code: static FormattingTuple format(final String messagePattern,
                                    Object argA, Object argB) {
          return arrayFormat(messagePattern, new Object[]{argA, argB});
      }
docs: Performs a two argument substitution for the 'messagePattern' passed as
  parameter.
  <p/>
  For example,
  <p/>
  <pre>
  MessageFormatter.format(&quot;Hi {}. My name is {}.&quot;, &quot;Alice&quot;, &quot;Bob&quot;);
  </pre>
  <p/>
  will return the string "Hi Alice. My name is Bob.".
  
  @param messagePattern The message pattern which will be parsed and formatted
  @param argA           The argument to be substituted in place of the first formatting
  anchor
  @param argB           The argument to be substituted in place of the second formatting
  anchor
  @return The formatted message