Clarify the scope of a comment.
Clarify the scope of a comment.

Change-Id: Ie9836267ac2bca4b4f5509f0f2def288e7b8c9ab
Reviewed-on: https://code-review.googlesource.com/c/37955
Reviewed-by: Paul Wankadia <62d4e38bb1380f055ec4b899baa75e52af09c5f7@google.com>

google/re2,google/re2,google/re2,google/re2,google/re2