tests/test-issue352

revlog: avoid some unnecessary seek/tell syscalls

#!/bin/sh
# http://www.selenic.com/mercurial/bts/issue352

hg init foo
cd foo

A=`printf 'he\rllo'`

echo foo > "$A"
hg add
hg ci -A -m m
rm "$A"

echo foo > "hell
o"
hg add
hg ci -A -m m

echo foo > "$A"
hg debugwalk

exit 0