Googletest export

Document the fact that MatchAndExplain(T, MatchResultListener*) is supported.

PiperOrigin-RevId: 354172275

docs/gmock_cook_book.md

@@ -3618,6 +3618,9 @@ Expected: is divisible by 7
   Actual: 23 (the remainder is 2)
 ```
 
+Tip: for convenience, `MatchAndExplain()` can take a `MatchResultListener*`
+instead of `std::ostream*`.
+
 ### Writing New Polymorphic Matchers
 
 Expanding what we learned above to *polymorphic* matchers is now just as simple

googletest/include/gtest/gtest-matchers.h

@@ -67,6 +67,7 @@ namespace testing {
 //   1. a class FooMatcherMatcher that implements the matcher interface:
 //     using is_gtest_matcher = void;
 //     bool MatchAndExplain(const T&, std::ostream*);
+//       (MatchResultListener* can also be used instead of std::ostream*)
 //     void DescribeTo(std::ostream*);
 //     void DescribeNegationTo(std::ostream*);
 //