Teach our CMake lexer to recognize `[[...]]` multi-line strings, as used
in some 'check source compiles/runs' examples to pass literal C/C++ code
through a CMake function. Previously, this resulted in the lexer trying
to parse such code as CMake, which is obviously incorrect. Also, use the
new `[[` syntax in more places.
Note that, because `[[...]]` can also show up in some instances denoting
optional arguments, we only consider `[[` with no `=` as a string if the
`[[` is followed by a non-identifier character. This heuristic seems to
work for most existing usages.
Co-Authored-By: Georg Brandl <georg@python.org>
In commit 2f852580fb (CONTRIBUTORS: Improve formatting of
per-contributor hyperlinks, 2025-03-02) we accidentally added `mailto:`
on a few URLs that should use `https://` instead.
Reported-by: Rolf Eike Beer <eb@emlix.com>