old_contents: """
  redrock.constants
  =================
  
  Set constants used by the rest of the package.
  """
  max_velo_diff = 1000.0  # km/s
  min_resolution_integral = 0.99
  
  # From eqn 5 of Calura et al. 2012 (Arxiv: 1201.5121)
  # From McDonald et al. 2006 (Arxiv: 0405013)
  Lyman_series = {
      'LYA' : { 'line':1215.67, 'A':0.0023, 'B':3.64, 'var_evol':3.8 }
  }
  
new_contents: """
  redrock.constants
  =================
  
  Set constants used by the rest of the package.
  """
  max_velo_diff = 1000.0  # km/s
  min_resolution_integral = 0.99
  
  # Lyman-alpha from eqn 5 of Calura et al. 2012 (Arxiv: 1201.5121)
  # Other from eqn 1.1 of Irsic et al. 2013 , (Arxiv: 1307.3403)
  Lyman_series = {
      'Lya'     : { 'line':1215.67,  'A':0.0023,          'B':3.64, 'var_evol':3.8 },
      'Lyb'     : { 'line':1025.72,  'A':0.0023/5.2615,   'B':3.64, 'var_evol':3.8 },
      'Ly3'     : { 'line':972.537,  'A':0.0023/14.356,   'B':3.64, 'var_evol':3.8 },
      'Ly4'     : { 'line':949.7431, 'A':0.0023/29.85984, 'B':3.64, 'var_evol':3.8 },
      'Ly5'     : { 'line':937.8035, 'A':0.0023/53.36202, 'B':3.64, 'var_evol':3.8 },
  }
  
subject: add other Lyman-series