title: Commit same changes for all the branches?
body: <p>Maybe this is a general question but I have not found any clear answer.
  I was wondering whether it is possible to perform a change in some file that is available for several branches and push/commit this change throughtout all or several of the branches, not only the current one.
  I am thinking that this might be useful when you are programming in a protocol but the changes you are making (for example an improvement) can be applied to all the other protocols of the same general project.</p>
  
  <p>Cheers</p>