* Indent versionchanged at method level, not class level
* Mark up ``--help`` to avoid generating an en dash
* Use forward slash in Unix command line with a dollar sign ($) prompt

ctypes.CDLL instances.

ctypes.CDLL instances.

KeyError could be raised when cached function with full cache was
simultaneously called from differen threads with the same uncached arguments.

KeyError could be raised when cached function with full cache was
simultaneously called from differen threads with the same uncached arguments.

Extracted from revision a1daf2d289ad by Zachary Ware.

Windows requires at least the SYSTEMROOT environment variable to start Python.
If run_python_until_end() doesn't copy SYSTEMROOT, the function always fail on
Windows.

Patch by Berker Peksag.

Based on patch by Martin Panter.

Thanks to Xavier de Gaye for the report and patch improvements.