Steve Borho <steve@borho.org> [Thu, 07 Jan 2010 22:19:05 -0600] rev 11184
extdiff: add labels, read diff arguments from [merge-tools]
hgtk has been using these same configs since Feb. Users only have to name the
tools they would like to use, ex:
[extdiff]
kdiff3 =
meld =