geany/geany-plugins — pull request #62 by yqu (2012-07-24 16:59:24+00:00)
Title: GeanyVC: Add support for a custom external diff viewer.

If "geany_external_diff" is found in the path, it is run as
the diff viewer. It can be a script or symbolic link to any
custom diff tool, easily modifiable by the user.
Otherwise the usual diff tools are tried as previously.

Also useful to add some command line arguments to the diff command.