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This allows doing things like TEST_P(TestFixture, MAYBE(TestName))
for nicer conditional test disabling.

Upstream of cr/188748737.

Tested:
Added unit tests MacroNamingTest and MacroNamingTestNonParametrized.

Many code merge/upstream changes

revert googletest/test/gtest-param-test_test.cc

code merge, cleanups

As mentioned in issue #360:
"Now that all the platforms gtest supports work with value-parameterized
tests, we should remove the uses of the GTEST_HAS_PARAM_TESTS macro from
the codebase everywhere."
https://github.com/google/googletest/issues/360

When using INSTANTIATE_TEST_CASE_P with a lambda function which uses
'info' as parameter name, GCC complains that this would shadow
parameter 'info' used in the macro's VA_ARGS call.

This allows doing things like TEST_P(TestFixture, MAYBE(TestName)) for nicer conditional test disabling.

changes that haven't made it to svn. The descriptions of each change are listed
below.

- Fixes some python shebang lines.

- Add ElementsAreArray overloads to gmock. ElementsAreArray now makes a copy of
  its input elements before the conversion to a Matcher. ElementsAreArray can
  now take a vector as input. ElementsAreArray can now take an iterator pair as
  input.

- Templatize MatchAndExplain to allow independent string types for the matcher
  and matchee. I also templatized the ConstCharPointer version of
  MatchAndExplain to avoid calls with "char*" from using the new templated
  MatchAndExplain.

- Fixes the bug where the constructor of the return type of ElementsAre() saves
  a reference instead of a copy of the arguments.

- Extends ElementsAre() to accept arrays whose sizes aren't known.

- Switches gTest's internal FilePath class from testing::internal::String to
  std::string. testing::internal::String was introduced when gTest couldn't
  depend on std::string.  It's now deprecated.

- Switches gTest & gMock from using testing::internal::String objects to
  std::string. Some static methods of String are still in use.  We may be able
  to remove some but not all of them.  In particular, String::Format() should
  eventually be removed as it truncates the result at 4096 characters, often
  causing problems.

report; also removes the comment() and test_case_comment() fields of
TestInfo.  Proposed and initally implemented by Joey Oravec.
Re-implemented by Vlad Losev.

Allows a value-parameterized test fixture to derive from Test and WithParamInterface<T> separately; contributed by Matt Austern.

Fixes comments and tests for the moment of generator parameter evaluation in INSTANTIATE_TEST_CASE_P.

Adds missing copyright in test/gtest-test-part_test.cc (by Markus Heule).  Minor format adjustments.