… and enforce them with pycodestyle.

blocking all distutils from being compiled; removed distutils blacklists from the pyimport test and deleted the 'slow' test as it is now redundant

pyimport=True should work now on darwin without having to pre-import distutils directly or via pyxbuild

Found via `codespell`

Most are non-user facing. 
Found using:
`codespell -d -q 3`

The file is syntactically correct only in Python >= 2.6, so the
version check would never be run.

The indentation was inadvertently broken when expanding tabs in
e908c0b9.

Fixes:

    $ python pyximport/test/test_reload.py
      File "pyximport/test/test_reload.py", line 23
        assert hello.x == 1
        ^
    IndentationError: unexpected indent

fix test runner and pyximport in Py 2.7.9 and 3.4+: setuptools replaces "distutils.dist.Distribution" *after* we import it, which then breaks the input validation in "distutils.cmd"

fix test runner and pyximport in Py 2.7.9 and 3.4+: setuptools replaces "distutils.dist.Distribution" *after* we import it, which then breaks the input validation in "distutils.cmd"

--HG--
extra : transplant_source : %3A%84%AC%02E%17%D8%EE%E64Mpv%25%A3%8E%8B%E5%CA%19

this should be changed

It is very astonishing to a user, that pyximport uses a different
set of config files from the underlying distutils.

This reverts commit 813ff05a.

This was an accidentally applied twice.

--HG--
extra : rebase_source : 3998c84c9c2a646d9588103205666d37731c41a7

pyxbuild overwrites .so file contents, corrupting any mmapped code image
loaded. If pyximporting the same module from two different processes, on
Linux this leads to crashes with bus error.

This commit fixes the issue by unlinking the file first. On Linux et
al., this does not change the file contents of any open FDs.  On
Windows, unlinking fails, and we just switch to using a different file
name.

If '' is in sys.path and a module is found the package_path
is relative and breaks the build process.

If '' is in sys.path and a module is found the package_path
is relative and breaks the build process.

--HG--
extra : transplant_source : 9%EA%CC%A6%3D%1B9R%EF%0DmM%CFZ%18%F3%EC%06%3B%B7

Use OS-dependent directory separator - a / on windows is interpreted by LINK as a command line switch

--HG--
extra : transplant_source : %A8%F23%AF%26%BC%82y1%86S%1Ac%D3%40%089o%DCQ

Use OS-dependent directory separator - a / on windows is interpreted by LINK as a command line switch