[issue4015] [patch] make installed scripts executable on windows

[anatoly techtonik]

anatoly techtonik <techtonik at gmail.com> added the comment:

The solution with launcher is complex (if not complicated). It will make
scripts unportable - consider using a removable disk with your Python
and application script. The interpreter was not installed on target
system, but with .bat file application is still able to run.

In case there is a problem with registry (backup/restore/profile
migration operation) when recorded version differs from actual installed
file, you will have a great time trying to debug what your script fails
to work, because the version of Python is wrong. I would name this
behaviour implicit.

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<http://bugs.python.org/issue4015>
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