pure/mpatch: use StringIO instead of mmap (issue1493)
This is more portable than memory mapping /dev/zero: Windows obviously
does not have /dev/zero and mapping /dev/zero failed on Mac OS X.
#!/bin/sh
echo % prepare repo
hg init
echo "some text" > FOO.txt
echo "another text" > bar.txt
echo "more text" > QUICK.txt
hg add
hg ci -d '0 0' -mtest1
echo
echo % verify
hg verify
echo
echo % introduce some bugs in repo
cd .hg/store/data
mv _f_o_o.txt.i X_f_o_o.txt.i
mv bar.txt.i xbar.txt.i
rm _q_u_i_c_k.txt.i
echo
echo % verify
hg verify
exit 0