bug#56118: [PATCH] Fix typo in Info description of 'auto-insert-alist'

[Richard Stallman]

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  >  @code{auto-insert-alist}.  The @sc{car}s of this list are each either
  >  a mode name, making an element applicable when a buffer is in that
  > -mode.  Or they can be a string, which is a regexp matched against the
  > +mode, or they can be a string, which is a regexp matched against the

The change is ok, but deleting "they can be" would make it better writing.

-- 
Dr Richard Stallman (https://stallman.org)
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)