file status during merge

[Bela Babik]

> Try:
>
> hg st --rev fc4e # status relative to parent one
> hg st --rev f441 # status relative to parent two

$ hg status
M sasa

$ hg identify
fc4e27b314f3+f441c5e7ce91+ (head) tip

$ hg st --rev fc4e
M sasa

$ hg st --rev f441

$

Yep, I can write a script or an extension which compares the two hg
status output and create a suitable one.