prolog-char-quote-workaround

prolog-char-quote-workaround is a variable defined in `prolog.el'.
Its value is

nil

• This variable is obsolete since 24.1.

Documentation:
If non-nil, declare 0 as a quote character to handle 0'.
This is really kludgy, and unneeded (i.e. obsolete) in Emacs>=24.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.