run-tests: remove files that we potentially create outside of $TMPDIR [ original upstream message ]

run-tests: remove code that creates a dummy 'diffstat' This was introduced in fb1d7a42663c for an old test that is no longer the same. [ original upstream message ]

tests: skip tests that require not having root (issue4089) This adds a new root hghave to test against. Almost all of these are a subset of unix-permissions, but that is also used for checking exec bit handling. [ original upstream message ]

Merge with stable

hghave: add "py3k" feature to check whether test runs with Python 3.x This patch adds "py3k" feature to check whether test runs with Python 3.x. This check is needed for portability of test code: for example, in the default, modules are imported relatively first with python 2.x, but imported absolutely with Python 3.x. [ original upstream message ]

hghave: add "absimport" feature to check "absolute_import" in __future__ This patch adds "absimport" feature to check whether "absolute_import" exists in __future__, which means supporting module loading by absolute name. This check is needed for portability of test code using "absolute_import", because Python earlier than 2.5 doesn't support it. [ original upstream message ]

Merge with stable

run-tests: place the .t shell script next to $TESTTMP and with a useful name --keep can thus keep it around - very convenient for debugging. [ original upstream message ]