Clang format and non-ascii characters don't get along well, which are
typically introduced when copy/pasting spec language. This CL will
detect non-ascii characters during presubmit.
Bug: angleproject:4601
Test: git cl presubmit --upload
Change-Id: I80080fc04590ad47c9756f8f969d5c7f44d41793
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2173684Reviewed-by: Shrek Shao <shrekshao@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Tim Van Patten <timvp@google.com>
