change comments in rebase-interactive is not working.
 that is just for a mark, we have to do real jobs later by git commit --amend
 it just help us reach here
change to script
 and if for 2 edits in same rebase-interactive
 we will have to do it commit by commit
 that means setting command to "edit" in interactive mode multiple times
 and we will do git commit --amend to change 1 comment of 1 commit
 then git rebase --continue to finish current step and move to next "edit" commit
 it is essentially to provide a easy progress help us move to each commit and change them