[PATCH] D79963: [llvm][test] Add COM: directives before colon-less non-CHECKs in comments. NFC

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

`; COM:` seems non-obvious and harms readability. The inconvenience may discourage contributors from writing comments.
For file types using `;` or `#` as line comment markers, won't `;; ` or `## ` be clearer?
Personally I use `;; ` and `## ` for new tests all the time since I learned the practice, however, I would be hesitant to enforce this because others' tendency may be different.


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https://reviews.llvm.org/D79963