wireprotoserver: add some blank lines between methods
Let's make this file slightly easier to read.
Differential Revision: https://phab.mercurial-scm.org/D1981
tests: start a set of unit tests for mdiff.py, starting with splitnewlines
I want to optimize splitnewlines, so writing tests seems prudent.
Differential Revision: https://phab.mercurial-scm.org/D1972
# no-check-commit because of test_ funciton