tests: add missing trailing 'cd ..' Many tests didn't change back from subdirectories at the end of the tests ... and they don't have to. The missing 'cd ..' could always be added when another test case is added to the test file. This change do that tests (99.5%) consistently end up in $TESTDIR where they started, thus making it simpler to extend them or move them around.

tests: cleanup of tests that got lost in their own nested directories Some tests ended up in a directory several directories deeper than $TESTTMP, usually because some 'cd ..' had been forgotten between different test cases. Add 'cd ..' where they are missing so the tests get back where they started.

tests: cleanup of tests that ended up outside $TESTTMP No harm done, but it might confuse later on.

tests: remove 'hghave symlink' from test-import-git.t The test had a long chain of commits depending on execbits in some of first commits. The hashes are checked throughout the file, so there was no elegant way to make it pass both with and without execbits. We now rollback the execbits-or-not commits and make a stable change instead. The hash chain is thus updated once but is now a bit more stable. The test coverage should be unaltered.

tests: remove 'hghave symlink' from test-convert-svn-sink.t The symlink was present all over the test and could not easily be guarded with #if. Symlink testing is now moved to a separate #if section. All the relevant test coverage should unaltered.

tests: convert some 'hghave symlink' to #if This will enable some tests for windows.

tests: drop a couple of unnecessary 'hghave symlink'