Some small cleanups for convert extension: - repo doesn't need to be imported - util.Abort doesn't need \n - space after comma - long lines - spacing

#!/bin/sh
# http://www.selenic.com/mercurial/bts/issue433

hg init a
cd a       
echo a > a 
hg commit -Ama 

hg parents -r 0 doesnotexist
true