vt               1600 maint/gnulib/lib/argp-help.c       char *vt = strchr (doc, '\v');
vt               1601 maint/gnulib/lib/argp-help.c       inp_text = post ? (vt ? vt + 1 : 0) : doc;
vt               1602 maint/gnulib/lib/argp-help.c       inp_text_limit = (!post && vt) ? (vt - doc) : 0;