Corrected code for invalid conversion specifier.
Added tests to verify.

Modified string.Formatter to correctly expand format_spec's,
and added a limit to recursion depth.  Added _vformat()
method to support both of these.

This should fix the Lib\test\test_uuid.py test on Windows.

interactive mode. Fixes #1100.

Fix the string formatting docs for now; if the feature is changed again, the docs can be changed too.

the acronym.

rather than just complaining about stderr not being what we expected masking
the true problem.

Fix segfault discovered by Ron Adam.  Not checking for terminating right bracket in "'{0[}'.format(())".  Fixed, and tests added.

Removed used_args param from string.Formatter.get_field.  It was left in by mistake from an earlier edit.

Partial py3k-ification of Doc/library/: convert has_key references into either 'k in d' or __contains__; normalize raise statements; convert print statements into print function calls.