comment

 *

 * @param cp is the start of the current token.

 * @param limit is the end of the current line of text.

 * @return const char* - pointer to the start of the token after this one, but if

 *    this token is a number, else NULL

 * @return const char* - if initial text was a number, then pointer to the text

 *         after this number, else NULL if initial text was not a number.

 */

static const char* isNumber( const char* cp, const char* limit )

{