Re: [PATCH v2] mergetool--lib: fix '--tool-help' to correctly show available tools

Philippe Blain [off-list ref] writes:

quoted

What was the symptom before the fix?  Is it just missing only some
tools among 30?  Was there some pattern in names of missing one and
the ones that still got output?  Or was it more like "we see nothing
shown"?

...
Note that 'vimdiff', 'nvimdiff3' (last variant for vimdiff),
'bc' and 'bc4' (last variant for bc) are absent, and
all other tools that have no variants are absent as well.

Thanks, that is exactly the kind of "some pattern" I wanted to see
us looking for, because I wonder if it is a more robust and cheaper
(maintenance wise) approach to find one single tool that we support,
which does not have, and which is unlikely to gain, any numbered
variants.  If we can find such a tool, we can grep for its name in
the output.