work around python bug on solaris 10. write to file opened mode 'a+' should write to end of file and update offset pointer, but does not (solaris 10 has python 2.3.3). fix is to always seek.

#!/bin/sh

hg init
echo This is file a1 > a
hg add a
hg commit -m "commit #0" -d "1000000 0"
touch b
hg add b
rm b
hg commit -A -m"comment #1" -d "1000000 0"