[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

geometry/monotone_chain.py

@@ -25,6 +25,7 @@ class Point(NamedTuple):
     >>> Point(1.5, -2.0)
     Point(x=1.5, y=-2.0)
     """
+
     x: float
     y: float