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Comments changes, no functionality changes. 

Comments changes, no functionality changes

code management comments, [ci-skip], no functionality changes

Formatting changes and code sync
Merge branch 'master' of https://github.com/google/googletest

Fix link

Formatting and a link

This change adds the ability to generate stacktraces in Google Test on
both failures of assertions/expectations and on crashes. The
stacktrace support is conditionally available only when using Abseil
with Google Test.

To use this support, run the test under Bazel with a command like this:

bazel test --define absl=1 --test_env=GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1 //path/to/your:test

The "--define absl=1" part enables stacktraces on assertion/expectation
failures.

The "--test_env=GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1" part enables
the signal handler that logs a stacktrace in the event of a crash
(this also requires the "--define absl=1" part). This is not the
default since it may interfere with existing tests.

GTEST_TEST_FILTER_ENV_VAR_ was used to specify an environment variable to obtain
the default test filter from. By default it was unset which broke
"--test_filter" for bazel. This CL eliminates GTEST_TEST_FILTER_ENV_VAR_ and
explicitly obtains the default test filter from the environment variable
TESTBRIDGE_TEST_ONLY if it exists.

When we do parallel test execution with a process for a test,
initialization of gtest become performance bottleneck when the test
binary contains many testcases.

Especially, some parameterlized test in chromium browser affected by
largely when address sanitizer is enabled.
Address sanitizer does not allow using optimized strcmp function and
test addition in parameterized test require lookup of test case using
strcmp.

This patch reduces the number of strcmp, it is called when registering
parameterized test. Using reverse iterator improves the time to find
registered tests in such case.

Some tests for chromium browser using address sanitizer finished 2x
faster with this patch.

Rename AdvancedGuide.md to advanced.md and adjust the links. 
Part of documentation rationalization work

Fix the bug where ad_hoc_test_result() functions of UnitTest and TestCase objects would return failures registered at TestCase and UnitTest scopes, respectively.

This uses asm("int3") for clang/gcc on x86 as alternative for DebugBreak()

The full message unlike summary also includes stack trace.

This change allows emitting output in JSON format in addition to the
already supported XML format. The implementation as well as the file
structure is intentionally modelled after the XML one.

while not losing benefits of EXPECT, and not killing the whole test,
as with --gtest_throw_on_failure.

183822976

This makes it easier to use GTest in projects that build with the
-Wmissing-declarations warning. This fixes the warning in headers and
source files, though not GTest's own tests as it is rather noisy there.

instead of reading more like reversing the former "expected" and "actual"
roles of the LHS and RHS arguments.

This patch is manually applied from internal version (125109873)