Fix a typographical error.
Change-Id: I637c50a52d1e4b54000c6f368d5a89f9468a2ac7
Reviewed-on: https://code-review.googlesource.com/c/re2/+/42512
Reviewed-by: Paul Wankadia <junyer@google.com>
diff --git a/re2/prefilter_tree.h b/re2/prefilter_tree.h
index 10d6f7c..b2e2d74 100644
--- a/re2/prefilter_tree.h
+++ b/re2/prefilter_tree.h
@@ -7,7 +7,7 @@
// The PrefilterTree class is used to form an AND-OR tree of strings
// that would trigger each regexp. The 'prefilter' of each regexp is
-// added tp PrefilterTree, and then PrefilterTree is used to find all
+// added to PrefilterTree, and then PrefilterTree is used to find all
// the unique strings across the prefilters. During search, by using
// matches from a string matching engine, PrefilterTree deduces the
// set of regexps that are to be triggered. The 'string matching
