bug#66756: 30.0.50; [PATCH] Improve discussion of 'let' in Elisp Introduction manual

[Richard Stallman]

[[[ To any NSA and FBI agents reading my email: please consider    ]]]
[[[ whether defending the US Constitution against all enemies,     ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]

This change is overall a step forward.  Thanks for working on it.

A few specific parts of the new text could use a little cleaning up;
some of those parts are in the current version also.

    +``scope'').  @code{let} creates a name for a @dfn{local variable} that
    +overshadows any use of the same name outside the @code{let} expression
    +(we call this ``binding'' the variable).

The word "overshadows" seems stramge here.  The usual term is "shadows",
and I don't see that "overshadows" adds any clarity.

  >   For historical reasons, Emacs Lisp uses a form of
  > +variable binding called ``dynamic binding''.

This should say "by default", because it isn't always so.  For
instance, if you specify lexical binding, then Emacs Lisp does not use
dynamic binding, except for variables marked special.

  > +lexical binding, you should add something like this to the first line

Delete "something like".



-- 
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)