commands: use keyword arguments in update function
This will help us in having a dictionary with the values of all the arguments
and we can add more flags without adding an argument to the function.
Differential Revision: https://phab.mercurial-scm.org/D2896
# The 9diff extdiff command generates diff(1) compatible output
# suitable for use with the plumber(4).
[extensions]
extdiff =
[extdiff]
9diff = /bin/mercurial/9diff -cm $parent $child $root