Use gender-neutral pronouns in comments and docs

googlemock/test/gmock-cardinalities_test.cc

@@ -391,7 +391,7 @@ TEST(ExactlyTest, HasCorrectBounds) {
   EXPECT_EQ(3, c.ConservativeUpperBound());
 }
 
-// Tests that a user can make his own cardinality by implementing
+// Tests that a user can make their own cardinality by implementing
 // CardinalityInterface and calling MakeCardinality().
 
 class EvenCardinality : public CardinalityInterface {

googlemock/test/gmock-internal-utils_test.cc

@@ -49,7 +49,7 @@
 // implementation.  It must come before gtest-internal-inl.h is
 // included, or there will be a compiler error.  This trick is to
 // prevent a user from accidentally including gtest-internal-inl.h in
-// his code.
+// their code.
 #define GTEST_IMPLEMENTATION_ 1
 #include "src/gtest-internal-inl.h"
 #undef GTEST_IMPLEMENTATION_

googlemock/test/gmock-spec-builders_test.cc

@@ -2682,7 +2682,7 @@ TEST(SynchronizationTest, CanCallMockMethodInAction) {
 
 }  // namespace
 
-// Allows the user to define his own main and then invoke gmock_main
+// Allows the user to define their own main and then invoke gmock_main
 // from it. This might be necessary on some platforms which require
 // specific setup and teardown.
 #if GMOCK_RENAME_MAIN