w3c/web-platform-tests — pull request #1446 by jgraham (2014-12-08 17:29:48+00:00)
Title: When updating manifest from a non-checkout put changes into local_changes section

Instead of overwriting manifest entries when updating against a local copy (not clone) of
the tests, put differences into the local_changes section, rather than overwriting the
data about upstream. This makes resyncing changes with upstream easier.