/
-----master----.    b
                \  /
                 \/
                  a
                   \.
 

There are two branches a and b
a has changes in file z.py, x.py

b has changes in file s.py, f.py   (they have no common file)

If I do `$ arc diff origin/master` in branch b. Then will there be changes in files z.py, x.py also present in the diff?

If I just want the changes in file s.py, f.py to be present in file then what should I do?