anchor.diff:  		[
   		].
   
  +%%--------------------------------------------------------------------
  +
   remove_left(
   		#ee_buffer{lines = Lines} = Buffer,
   		#ee_buffer_coords{} = RemoveCoords
  
positive.code: 		[
  		?_assertEqual(#ee_buffer{lines = [#ee_buffer_line{}]}, new())
  		].
  
  create_from_string(
  		String
  
negative.code: 			]},
  			create_from_string("Hello\nWorld"))
  		].
  
  %%--------------------------------------------------------------------
  
  insert_text(
  		#ee_buffer{lines = Lines},
  