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

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Author: pre-commit-ci[bot]

physics/relativistic_velocity_summation.py

@@ -1,14 +1,15 @@
 c = 299792458
 
 """
-The relativistic velocity summation formula calculates the combined velocity v2 
-of an object moving at speed v1 relative to a frame that is itself moving at velocity v 
+The relativistic velocity summation formula calculates the combined velocity v2
+of an object moving at speed v1 relative to a frame that is itself moving at velocity v
 relative to an observer. I take the last one to be strictly lower than the speed of
 light.
 The formula is v2 = (v1 + v)/(1 + v1 * v / c^2)
 """
 
-def relativistic_velocity_summation (v1: float, v: float) -> float:
+
+def relativistic_velocity_summation(v1: float, v: float) -> float:
     """
     >>> relativistic_velocity_summation(200000000, 200000000)
     276805111.0636436
@@ -20,8 +21,11 @@ def relativistic_velocity_summation (v1: float, v: float) -> float:
     ValueError: Speeds must not exceed light speed, and the frame speed must be lower than the light speed!
     """
     if v1 > c or v >= c or v1 < -c or v <= -c:
-        raise ValueError("Speeds must not exceed light speed, and the frame speed must be lower than the light speed!")
-    return (v1 + v)/(1 + v1 * v / (c * c)) 
+        raise ValueError(
+            "Speeds must not exceed light speed, and the frame speed must be lower than the light speed!"
+        )
+    return (v1 + v) / (1 + v1 * v / (c * c))
+
 
 if __name__ == "__main__":
     from doctest import testmod