Previously there was an error where you could have:
global: {"key": ["something"]}
local: {}
And called SetConfig("key", None, missing_ok=False) - this would end
up raising CalledProcessError(returncode=5) because the caching
layer would see that "key" was not missing, then call into the
storage layer which would do `git config --local ...` which was
missing "key" (and therefore fail).
R=ayatane, yiwzhang
Change-Id: Idc9dc63a1b1c0a4a203c403dbb3c2ea521099b26
Bug: 342644760
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/5744333
Reviewed-by: Yiwei Zhang <yiwzhang@google.com>
Commit-Queue: Allen Li <ayatane@chromium.org>
Auto-Submit: Robbie Iannucci <iannucci@chromium.org>
