Apparently, FreeBSD doesn't raise OSError when offset is
not a multiple of mmap.PAGESIZE.

Previously, its behavior was platform-dependent and there was no error checking
under Windows.

Raise TypeError instead of SystemError for unsupported operations.

kB (*kilo* byte) unit means 1000 bytes, whereas KiB ("kibibyte")
means 1024 bytes. KB was misused: replace kB or KB with KiB when
appropriate.

Same change for MB and GB which become MiB and GiB.

Change the output of Tools/iobench/iobench.py.

Round also the size of the documentation from 5.5 MB to 5 MiB.

Patch by Xavier de Gaye.

other write methods.

Patch by Jakub Stasiak.

Patch from John Beck.

codecs, that accepted only read-only bytes-like object now accept writable
bytes-like object too.

Patch by Serhiy Storchaka.

needed.

Remove also an unused variable (blank) in test_threading.

Lehtinen.

Also, reduce code duplication in LargeMmapTests.

Original patch by Steffen Daode Nurpmeso.

Also, reduce code duplication in LargeMmapTests.

Original patch by Steffen Daode Nurpmeso.

`mmap.PROT_READ|mmap.PROT_EXEC` would segfault instead of raising a
TypeError.  Patch by Charles-François Natali.