🚀 go-pugleaf

fnmatch(), used by most of the other gnu utilities for file name
globbing, allows both `!' and `^' to negate character classes.

wildmat(), used by tar-1.11, only allowed `!' until now:


*** OLD/wildmat.c	Thu Sep 10 17:03:38 1992
--- wildmat.c	Thu Sep 10 17:04:32 1992
***************
*** 104,110 ****
  		return(*++p ? Star(s, p) : TRUE);
  	    case '[':
  		/* [!....] means inverse character class. */
! 		if (reverse = p[1] == '!')
  		    p++;
  		for (last = 0400, matched = FALSE; *++p && *p != ']'; last = *p)
  		    /* This next line requires a good C compiler. */
--- 104,110 ----
  		return(*++p ? Star(s, p) : TRUE);
  	    case '[':
  		/* [!....] means inverse character class. */
! 		if (reverse = (p[1] == '!' || p[1] == '^'))
  		    p++;
  		for (last = 0400, matched = FALSE; *++p && *p != ']'; last = *p)
  		    /* This next line requires a good C compiler. */