looking-back should be documented in elisp manual

[Michael Slass]

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In GNU Emacs 21.3.1 (i386-redhat-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2003-10-27 on daffy.perf.redhat.com
configured using `configure  --host=i386-redhat-linux --build=i386-redhat-linux 
--target=i386-redhat-linux-gnu --program-prefix= --prefix=/usr 
--exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc 
--datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib 
--libexecdir=/usr/libexec --localstatedir=/var --sharedstatedir=/usr/com 
--mandir=/usr/share/man --infodir=/usr/share/info --with-gcc --with-pop 
--with-sound'
Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: en_US
  locale-coding-system: iso-latin-1
  default-enable-multibyte-characters: t

Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:

The function looking-at is documented in the elisp manual, but looking-back
is not.  It should be, and should be on the same page (or at least
referenced from) the same page as looking-at.




Recent input:
I ' ' ' SPC <backspace> <backspace> <backspace> <backspace> 
' v e SPC o f t e n SPC w a n t e d SPC t h a t SPC 
t o o . SPC SPC I ' ' SPC <backspace> <backspace> l 
l SPC s u b m i t SPC a n SPC e m a c s SPC b u g . 
<backspace> SPC f <backspace> f o r SPC t h e SPC d 
o c s . C-c C-c M-x r e p o r t - e m <tab> b u g 
<return>

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