Minor merge fixups
return a proper errorlevel on abort
let force jump across branches
catch exception on unlink
manifest hash: 6787814cd75e9f9623c56dc36f865afd54f56bfa
+ hg init
+ echo This is file a1
+ hg add a
+ hg commit -t 'commit #0' -d '0 0' -u user
+ touch b
+ hg add b
+ rm b
+ hg commit -A '-tcomment #1' -d '0 0' -u user
b never committed!