rem: collapse_escapes (char *strptr)
add: collapse_escapes (char const *strptr)
context: collapse_escapes (char *strptr){  register char *strout;  strout = strptr;		/* Start at the same place, anyway. */  while (*strptr)    {      if (*strptr != '\\')	/* Is it an escape character? */	*strout++ = *strptr++;	/* No, just transfer it. */      else	{	  switch (*++strptr)	    {	    case '0':	      *strout++ = EMPTY_DELIM;	      break;	    case 'b':	      *strout++ = '\b';	      break;	    case 'f':	      *strout++ = '\f';	      break;	    case 'n':	      *strout++ = '\n';	      break;	    case 'r':	      *strout++ = '\r';	      break;	    case 't':	      *strout++ = '\t';	      break;	    case 'v':	      *strout++ = '\v';	      break;	    default:	      *strout++ = *strptr;	      break;	    }	  strptr++;	}    }  return strout;}