Fix a typographical error.

Change-Id: Ie02f840baaa7c5056dfb281b2611c9d48525c51f
Reviewed-on: https://code-review.googlesource.com/c/re2/+/61010
Reviewed-by: Perry Lorier <perryl@google.com>
Reviewed-by: Paul Wankadia <junyer@google.com>
1 file changed