Merge branch 'ps/fetch-output-format'

"git fetch" learned the "--porcelain" option that emits what it did in a machine-parseable format. * ps/fetch-output-format: fetch: introduce machine-parseable "porcelain" output format fetch: move option related variables into main function fetch: lift up parsing of "fetch.output" config variable fetch: introduce `display_format` enum fetch: refactor calculation of the display table width fetch: print left-hand side when fetching HEAD:foo fetch: add a test to exercise invalid output formats fetch: split out tests for output format fetch: fix `--no-recurse-submodules` with multi-remote fetches