call site 13 for path.local.read
apigen/testing/test_apigen_example.py - line 182
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   def test_build_class_pages(self):
       self.apb.build_class_pages(['main.SomeClass', 'main.SomeSubClass'])
       clsfile = self.base.join('api/main.SomeClass.html')
       assert clsfile.check()
->     html = clsfile.read()
       _checkhtml(html)