ilyaza

I use nested parentheses *extensively* for MANY years, and this is the first time I see a need for double braces. (But before I did not need `([] STUFF)` syntax ...

perl_mlb is a part of a binary-installer distribution which contains/installs/delivers the main perl library. Whatever it contains is not a primary source. Does it answer your question?

I do not follow your logic. The error **is not** ``` ! Extra alignment tab has been changed to \cr. ``` The error I observe is not with the ampersand...

BTW, while `\let\ampersand=*` inside `tabular` leads to the error above, doing ``` tex \expandafter\let\csname ampersand\endcsname=*% ``` is safe. I have no clue why. In particular, all the temporary macros which...

Oups, cannot reproduce my preceding claim any more. Doing it inside `tabular` *does not* hide catcode=4 from the scanner… Still: ``` ! Extra alignment tab has been changed to \cr....