rem: else if (!posixly_correct && (*p == 'u' || *p == 'U'))
add: else if (*p == 'u' || *p == 'U')
context: print_esc (const char *escstart){  register const char *p = escstart + 1;  int esc_value = 0;		/* Value of \nnn escape. */  int esc_length;		/* Length of \nnn escape. */  if (!posixly_correct && *p == 'x')    {      /* A hexadecimal \xhh escape sequence must have 1 or 2 hex. digits.  */      for (esc_length = 0, ++p;	   esc_length < 2 && ISXDIGIT (*p);	   ++esc_length, ++p)	esc_value = esc_value * 16 + hextobin (*p);      if (esc_length == 0)	error (EXIT_FAILURE, 0, _("missing hexadecimal number in escape"));      putchar (esc_value);    }  else if (*p == '0')    {      /* An octal \0ooo escape sequence has 0 to 3 octal digits	 after the leading \0.  */      for (esc_length = 0, ++p;	   esc_length < 3 && isodigit (*p);	   ++esc_length, ++p)	esc_value = esc_value * 8 + octtobin (*p);      putchar (esc_value);    }  else if (*p && strchr ("\"\\abcfnrtv", *p))    print_esc_char (*p++);  else if (!posixly_correct && (*p == 'u' || *p == 'U'))    {      char esc_char = *p;      unsigned int uni_value;      uni_value = 0;      for (esc_length = (esc_char == 'u' ? 4 : 8), ++p;	   esc_length > 0;	   --esc_length, ++p)	{	  if (!ISXDIGIT (*p))	    error (EXIT_FAILURE, 0, _("missing hexadecimal number in escape"));	  uni_value = uni_value * 16 + hextobin (*p);	}      /* A universal character name shall not specify a character short	 identifier in the range 00000000 through 00000020, 0000007F through	 0000009F, or 0000D800 through 0000DFFF inclusive. A universal	 character name shall not designate a character in the required	 character set.  */      if ((uni_value <= 0x9f	   && uni_value != 0x24 && uni_value != 0x40 && uni_value != 0x60)	  || (uni_value >= 0xd800 && uni_value <= 0xdfff))	error (EXIT_FAILURE, 0, _("invalid universal character name \\%c%0*x"),	       esc_char, (esc_char == 'u' ? 4 : 8), uni_value);      print_unicode_char (stdout, uni_value, 0);    }  else    {      putchar ('\\');      if (*p)	{	  putchar (*p);	  p++;	}    }  return p - escstart - 1;}