Patch from Xiang Zhang.

in and out of the Py_ssize_t range.  Patch by Xiang Zhang.

behavior: creating a database in 'r' and 'w' modes and modifying a database
in 'r' mode.

__file__ is relative in this case.

It was added for Python 3.4 in a0b750ea3397.

Users can now edit bad entries instead of starting over.

SHOW_ALLOC_COUNT or SHOW_TRACK_COUNT macros is now off by  default.  It can
be re-enabled using the "-X showalloccount" option.  It now outputs to stderr
instead of stdout.

negative integer for resized bytearray.

negative integer for resized bytearray.

For unknown reasons it perhaps caused a crash on 32-bit Windows (issue #).

file.

now return an instance of corresponding subclass.

shelve.open() documentation was updated in f351fb7ea179.

This is a revertion of cfc66e37eb8e.

Thanks to 鄭景文 for the bug report. Thanks to Tin Tvrtković, Xiang
Zhang, and Dan McCombs for diagnosing the issue.

Based on patch by Gabriel Genellina.

Based on patch by Gabriel Genellina.

Patch written by R. David Murray.