contributor: change mentions of mpm to olivia
Matt Mackall is now Olivia Mackall.
I reached out to her about changing the copyright notices to reflect this
change and she gave me the green light, so I changed everything relevant.
Differential Revision: https://phab.mercurial-scm.org/D10266
[fix]
clang-format:command = clang-format --style file
clang-format:pattern = set:(**.c or **.cc or **.h) and not "include:contrib/clang-format-ignorelist"
rustfmt:command = rustfmt +nightly
rustfmt:pattern = set:"**.rs" - "mercurial/thirdparty/**"
black:command = black
black:pattern = set:**.py - mercurial/thirdparty/**
# Mercurial doesn't have any Go code, but if we did this is how we
# would configure `hg fix` for Go:
go:command = gofmt
go:pattern = set:**.go