Re: [PATCH] simplified the chain if() statements of install_branch_config() function in branch.c

quoted

((!remote_is_branch && origin) || (!remote_is_branch || !origin))

Is it?

The above is the same as (!remote_is_branch || !origin).  What you wrote
before is the same as (!remote_is_branch).

Maybe you should try copy&paste from the expressions you are trying to
combine to make sure that what you start with makes sense.

OMG.. Really sorry for that... that was a silly mistake. 
This is the one..

((!remote_is_branch && origin) || (!remote_is_branch && !origin))