🚀 go-pugleaf

I wrote:
> This re-definition should satisfy the following constraints:
> - do not assume that the catcode of " is 12

To be more precise, better use this to check your solution:

% ------- CUT HERE ------
% use plainTeX
\catcode`\"=\active\gdef"{\"}
T"ater                     % output: T\"ater
\begingroup\catcode`\"=6   % (or another value 0..15)
  \showthe\catcode`\"      % print:  6
  % @<Insert your hack at this place@>
  \showthe\catcode`\"      % print:  6
  \catcode`\"=12
  T"ater                   % output: T''ater
  \catcode`\"=\active
  T"at\char"65 r           % output: T''ater
\endgroup
T"ater                     % output: T\"ater
\bye
% ------- CUT HERE ------


Have a nice weekend (;-)
  -bernd