old_contents: # # # # # # # # # # # # # #
  # CAPTAINHOOK IDENTIFIER  #
  # # # # # # # # # # # # # #
  import argparse
  
  from .utils import bash
  
  CHECK_NAME = 'block_branch'
  
  
  def run(files, temp_folder, arg=None):
      "Check we're not committing to a blocked branch"
      parser = get_parser()
      argos = parser.parse_args(arg.split())
  
      current_branch = bash('git symbolic-ref HEAD').value().decode('utf-8')
      current_branch = current_branch.replace('refs/heads/', '').strip()
      if current_branch in argos.branches:
          return ("Branch '{0}' is blocked from being "
                  "committed to.".format(current_branch))
  
  
  def get_parser():
      parser = argparse.ArgumentParser()
      parser.add_argument('branches', metavar='B', nargs='+',
                          help='a branch to block commits to')
      return parser
  
new_contents: # # # # # # # # # # # # # #
  # CAPTAINHOOK IDENTIFIER  #
  # # # # # # # # # # # # # #
  import argparse
  
  from .utils import bash
  
  CHECK_NAME = 'block_branch'
  
  
  def run(files, temp_folder, arg=None):
      "Check we're not committing to a blocked branch"
      parser = get_parser()
      argos = parser.parse_args(arg.split())
  
      current_branch = bash('git symbolic-ref HEAD').value()
      current_branch = current_branch.replace('refs/heads/', '').strip()
      if current_branch in argos.branches:
          return ("Branch '{0}' is blocked from being "
                  "committed to.".format(current_branch))
  
  
  def get_parser():
      parser = argparse.ArgumentParser()
      parser.add_argument('branches', metavar='B', nargs='+',
                          help='a branch to block commits to')
      return parser
  
subject: Remove decode from block branches check