message: Fix typo in UserInputError()
diff: @@ -333,8 +333,8 @@ def get_var(environ_cp,
  var = False
  else:
  raise UserInputError('Environment variable %s must be set as a boolean indicator.\n'
  - 'The followings are accepted as TRUE : %s.\n'
  - 'The followings are accepted as FALSE: %s.\n'
  + 'The following are accepted as TRUE : %s.\n'
  + 'The following are accepted as FALSE: %s.\n'
  'Current value is %s' %
  (var_name,
  ','.join(true_contents),
  