Re: Strange change in backquote expansion

[Richard Stallman]

    - add a new variable no-old-style-backquotes, with 2 values:
      t   = treat all backquotes and commas as new style
      nil = behave like now (i.e. try to tell which is which)

That would actually break the old code.  I don't want to do
it so abruptly.

For now I just want to warn about them the old-style code,
and handle it as it was intended.