Add newline at end of test_base.py to fix black formatting per PR #4951

Author: Abdulrahman-PROG

testsuite/MDAnalysisTests/analysis/test_base.py

@@ -652,4 +652,4 @@ def distance(a, b):
     Distances = base.analysis_class(distance)
 
     with no_deprecated_call():
-        d = Distances(u.atoms[:10], u.atoms[10:20]).run()
+        d = Distances(u.atoms[:10], u.atoms[10:20]).run()