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

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

Author: pre-commit-ci[bot]

physics/collisions.py

@@ -117,13 +117,14 @@ def type_collision(
     kinetic_final = 0.5 * ((mass1 * velocity_final1**2) + (mass2 * velocity_final2**2))
 
     if kinetic_final == kinetic_initial and momentum_initial == momentum_final:
-        return f'Perfectly Elastic Collision'
-    elif not(kinetic_final == kinetic_initial) and momentum_initial == momentum_final:
-        return f'Perfectly Inelastic Collision'
+        return f"Perfectly Elastic Collision"
+    elif not (kinetic_final == kinetic_initial) and momentum_initial == momentum_final:
+        return f"Perfectly Inelastic Collision"
     else:
         return "Inelastic Collision"
 
 
 if __name__ == "__main__":
     import doctest
-    doctest.testmod()
+
+    doctest.testmod()