Tweak a comment.
Change-Id: I41f30dd7f24546b84e2e844cd8c6df8797db2f6c
Reviewed-on: https://code-review.googlesource.com/14131
Reviewed-by: Paul Wankadia <[email protected]>
diff --git a/re2/prog.cc b/re2/prog.cc
index 8dc90f8..b0ae375 100644
--- a/re2/prog.cc
+++ b/re2/prog.cc
@@ -540,7 +540,7 @@
// dominator of the instructions reachable from some "successor root" (i.e. it
// has an unreachable predecessor) and is considered a "dominator root". Since
// only Alt instructions can be "dominator roots" (other instructions would be
-// "leaves"), only Alt instructions require their predecessors to be computed.
+// "leaves"), only Alt instructions are required to be marked as predecessors.
//
// Dividing the Prog into "trees" comprises two passes: marking the "successor
// roots" and the predecessors; and marking the "dominator roots". Sorting the
