bdiff.c: Added support for py3k.
This patch adds support for py3k in bdiff.c. This is accomplished by including
a header file responsible for abstracting the API differences between python 2
and python 3.
#!/bin/sh
hg init a
cd a
cp $TESTDIR/binfile.bin .
hg add binfile.bin
hg ci -m 'add binfile.bin'
echo >> binfile.bin
hg ci -m 'change binfile.bin'
hg revert -r 0 binfile.bin
hg ci -m 'revert binfile.bin'
echo % diff -r 0 -r 1
hg diff --nodates -r 0 -r 1
echo % diff -r 0 -r 2
hg diff --nodates -r 0 -r 2
echo % diff --git -r 0 -r 1
hg diff --git -r 0 -r 1
echo % diff --git -r 0 -r 2
hg diff --git -r 0 -r 2