Missing parenthesis.

PiperOrigin-RevId: 602864815
Change-Id: I74db20c93f6a7d9046779677cb4a328dc54bae69
diff --git a/absl/strings/escaping.h b/absl/strings/escaping.h
index f6f7a29..8f98017 100644
--- a/absl/strings/escaping.h
+++ b/absl/strings/escaping.h
@@ -66,7 +66,7 @@
 //
 //   std::string s = "foo\\rbar\\nbaz\\t";
 //   std::string unescaped_s;
-//   if (!absl::CUnescape(s, &unescaped_s) {
+//   if (!absl::CUnescape(s, &unescaped_s)) {
 //     ...
 //   }
 //   EXPECT_EQ(unescaped_s, "foo\rbar\nbaz\t");