Re: PATCH: Explicitly show how let works on global-variables

[Richard Stallman]

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  > This manual already says, in the previous subsection:

  >      Local variables created by a ‘let’ expression retain their value
  >   _only_ within the ‘let’ expression itself (and within expressions called
  >   within the ‘let’ expression); the local variables have no effect outside
  >   the ‘let’ expression.

  > Doesn't this cover the issue?

In an introductory manual like this one, it is good
to repeat an important point, if that helps users understand
the subject.  It's worth another few lines to say this a second time,
and even a third time, to get the point across clearly.

An additional example would probably be good too.

-- 
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)