tests/test-wireproto.py.out

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

Hello, Foobar
['Hello, Fo, =;:<o', 'Hello, Bar']