code: def git_support(fn, command):
      
      # supports GitHub's `hub` command
      # which is recommended to be used with `alias git=hub`
      # but at this point, shell aliases have already been resolved
      if not is_app(command, 'git', 'hub'):
          return False
  
      # perform git aliases expansion
      if 'trace: alias expansion:' in command.output:
          search = re.search("trace: alias expansion: ([^ ]*) => ([^\n]*)",
                             command.output)
          alias = search.group(1)
  
          # by default git quotes everything, for example:
          #     'commit' '--amend'
          # which is surprising and does not allow to easily test for
          # eg. 'git commit'
          expansion = ' '.join(shell.quote(part)
                               for part in shell.split_command(search.group(2)))
          new_script = command.script.replace(alias, expansion)
  
          command = command.update(script=new_script)
  
      return fn(command)
docs: Resolves git aliases and supports testing for both git and hub.