[Python] In a pytest coverage report, what does "->" mean for missing lines?

I'm running pytest with the coverage plugin (pytest --cov) and in the report I got the following line:

Name Stmts Miss Branch BrPart Cover Missing
---------------------------------------------------------
foo.py 5 1 2 1 71% 3->5, 5


I know that 3-5 would mean it missed lines 3 to 5, but I don't know what -> means. From the test logic, I'd expect only 5 to be reported. For reference, this is the code I used:

# foo.py

class Test:
def __lt__(self, other):
if type(self) == type(other):
return False
return NotImplemented


# test_foo.py

def test_lt():
test = Test()
assert not (test < test)

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