Re: [PATCH] Documentation/difftool: add deltawalker to list of valid diff tools

Tim Henigan [off-list ref] writes:

The list of valid tools seems prone to error. Right now, there is nothing
that tells people to update this documentation when new config files are
added to 'mergetools'.  Should I add a README to 'mergetools' with
instructions to update this file?  Or would it be better to replace the
list in the help string with a more general statement like "<tool> must
match one of the files located in $(git --exec-path)/mergetools"?

I would prefer to rip most of them out from this list in the
documentation, and refer people to ask the installed version of "git
difftool" to list them.  After bc7a96a (mergetool--lib: Refactor tools
into separate files, 2011-08-18), that should be the most sensible option.
I.e.

	--tool=<tool>::
		Use the diff tool specified by <tool>.  Valid diff tools
                include emerge, kompare, meld, and vimdiff; for complete
                list, run 'git difftool --tool-help'

or something.