bug#22340: 25.1.50; WoMan fails on groff.1 manpage

[Fran Burstall <feb@maths.bath.ac.uk>]

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Starting from 'emacs -Q':

1. M-x woman
2. Select groff, then groff.1

What I expected: a buffer containing a nicely formatted man page for
groff.

What I got: a fundamental-mode buffer containing a garbled version of
the nroff src of the man page.

Commentary:

1.  the page src has a definition (.de ...) of a font \f[CR]
which does get parsed correctly.  Then WoMan complains that CR is an
unknown font and eventually seems to give up on formatting.

2.  I get this behaviour with some other man pages but chose this one as
a typical example.

Thanks!
---Fran Burstall



In GNU Emacs 25.1.50.1 (i686-pc-linux-gnu, GTK+ Version 3.14.5)
 of 2016-01-09 built on darboux
Repository revision: 384cf23c6ed05e1f151032958a2cc2bb8100344b
Windowing system distributor 'The X.Org Foundation', version 11.0.11604000
System Description: LMDE 2 Betsy

Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS NOTIFY
LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11

Important settings:
  value of $LANG: en_GB.utf8
  locale-coding-system: utf-8-unix

Major mode: Fundamental

Minor modes in effect:
  tooltip-mode: t
  global-eldoc-mode: t
  electric-indent-mode: t
  mouse-wheel-mode: t
  tool-bar-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  blink-cursor-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t
  view-mode: t

Recent messages:
next-line: End of buffer
Building list of manual directory expansions...
Building completion list of all manual topics...
Making completion list...
uncompressing groff.1.gz...done
WoMan formatting buffer...
woman-change-fonts: End of buffer
mwheel-scroll: Beginning of buffer [37 times]
mwheel-scroll: End of buffer [4 times]
mwheel-scroll: Beginning of buffer [14 times]

Load-path shadows:
None found.

Features:
(shadow sort gnus-util mail-extr emacsbug message dired dired-loaddefs
format-spec rfc822 mml mml-sec mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils disp-table view jka-compr woman
cl-extra man ansi-color help-fns help-mode easymenu cl-loaddefs pcase
cl-lib time-date mule-util tooltip eldoc electric uniquify ediff-hook
vc-hooks lisp-float-type mwheel x-win term/common-win x-dnd tool-bar dnd
fontset image regexp-opt fringe tabulated-list newcomment elisp-mode
lisp-mode prog-mode register page menu-bar rfn-eshadow timer select
scroll-bar mouse jit-lock font-lock syntax facemenu font-core frame
cl-generic cham georgian utf-8-lang misc-lang vietnamese tibetan thai
tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian
slovak czech european ethiopic indian cyrillic chinese charscript
case-table epa-hook jka-cmpr-hook help simple abbrev obarray minibuffer
cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote dbusbind inotify
dynamic-setting system-font-setting font-render-setting move-toolbar gtk
x-toolkit x multi-tty make-network-process emacs)

Memory information:
((conses 8 132871 11727)
 (symbols 24 19831 0)
 (miscs 20 62 222)
 (strings 16 26043 4071)
 (string-bytes 1 578486)
 (vectors 8 12354)
 (vector-slots 4 442937 3082)
 (floats 8 155 179)
 (intervals 28 346 8)
 (buffers 520 16)
 (heap 1024 29465 760))

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