new_contents: import numpy as np
  
  from ..angles import Longitude, Latitude, Angle
  from ...tests.helper import pytest
  from ... import units as u
  
  def test_colon():
      a = Angle(1.113355, unit=u.deg)
      assert a.to_string(fields=2, sep=':') == u'1:07'
      assert a.to_string(fields=2, sep='dms') == u'1d07m'
      assert a.to_string(fields=3, sep=':') == u'1:06:48.078'
      assert a.to_string(fields=1, sep=':') == u'1'
  
subject: test file for checking coordinate colon issue