[Bug modula2/117411] Request for documentation to include exception example

[gaius at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117411

--- Comment #3 from Gaius Mulley <gaius at gcc dot gnu.org> ---
Created attachment 60359
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=60359&action=edit
Proposed patch containing documentation section and new example test code

This patch contains an additional section in gcc/doc/gm2.texi and
includes a new regression test gcc/testsuite/gm2/iso/run/lazyunique.mod.