modula2: Don't treat % in Modula 2 messages specially

modula2: Don't treat % in Modula 2 messages specially

On top of the just posted patch, this patch makes sure that
any % chars in message strings aren't treated as format chars.
None of these functions take variable number of arguments, so for
most of format specifiers there is nowhere to take arguments from,
it is true that a couple of format specifiers don't take any
arguments - %%, %m, %<, %>, %' - so it is actually possible
to use them, but one needs to verify that no other are emitted and
that what should be printed as % is really emitted as %%.
If the FE does that, then please ignore this patch, otherwise I think
it is safer to do this.

2022-12-19  Jakub Jelinek  <jakub@redhat.com>

	* gm2-gcc/m2linemap.cc (m2linemap_ErrorAt, m2linemap_ErrorAtf,
	m2linemap_WarningAtf, m2linemap_NoteAtf, m2linemap_internal_error):
	Call functions with "%s", message rather than just message, so that
	% chars in message aren't treated as format specifiers.