我用doctest编写了一个函数。 doctest包含超过79个字符的输出，因此PEP8-checker应该抱怨，
simulation.py:267:80：E501行太长（344> 79个字符）
def walk_depth_order(tree, root_depth=0):
"""Walk a tree in depth order, highest nodes first.
>>> from newick import loads
>>> t = lambda x: newick.loads(x)[0]
>>> intermingled = "((((A:1.9,B:1.8)K:5,(C:4.7,D:4.6)N:2)P:1,(E:2.5,"\\
... "F:2.4)L:5)Q:2,((G:5.3,H:5.2)O:3,(I:3.1,J:3.0)M:5)R:1)S;"
>>> list(walk_tree_depth_order(t(intermingled)))
[(Node("S"), 0), (Node("R"), 1.0), (Node("Q"), 2.0), (Node("P"), 3.0), (Node("O"), 4.0), (Node("N"), 5.0), (Node("M"), 6.0), (Node("L"), 7.0), (Node("K"), 8.0), (Node("J"), 9.0), (Node("I"), 9.1), (Node("H"), 9.2), (Node("G"), 9.3), (Node("F"), 9.4), (Node("E"), 9.5), (Node("D"), 9.6), (Node("C"), 9.7), (Node("B"), 9.8), (Node("A"), 9.9)]
"""
...
我希望持续集成测试继续检查PEP8违规，我希望doctest检查，所以我该怎么办？