pylint-2.6: use newer pyquotes
pylint-2.6: use newer pyquotes

Bug: 1123433
Change-Id: I60dc7bbcf6216fc90b58d32d99072f998501509d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2518471
Reviewed-by: Owen Rodley <ac3ca500c35ad8417cba974d309c69594f145e39@chromium.org>
Commit-Queue: Mike Frysinger <8f3f75c74bd5184edcfa6534cab3c13a00a2f794@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools