- Use _PyLong_FormatWriter() instead of formatlong() when possible, to avoid
   a temporary buffer
 - Enable the fast path when width is smaller or equals to the length,
   and when the precision is bigger or equals to the length
 - Add unit tests!
 - formatlong() uses PyUnicode_Resize() instead of _PyUnicode_FromASCII()
   to resize the output string

patch by Serhiy Storchaka

gil_interval == 1 in extreme situations.

Patch by Serhiy Storchaka.

The default reST role `foo` can now be used in NEWS to refer to Python objects. Use it for a fraction of the current NEWS file.

* rename to "Changelog"
* recognize more issue links
* add NEWS as a dependency for Sphinx