Cosmetic edits

Author: jacobtylerwalls

doc/whatsnew/fragments/8789.other

@@ -1,3 +1,3 @@
-Renamed the "unneeded-not" error into "unnecessary_negation" to be clearer
+Renamed the "unneeded-not" error into "unnecessary_negation" to be clearer.
 
 Closes #8789

pylint/checkers/refactoring/not_checker.py

@@ -20,7 +20,8 @@ class NotChecker(checkers.BaseChecker):
         "C0117": (
             'Consider changing "%s" to "%s"',
             "unnecessary-negation",
-            "Used when a boolean expression contains an unneeded negation, e.g. when two negation operators cancel each other out.",
+            "Used when a boolean expression contains an unneeded negation, "
+            "e.g. when two negation operators cancel each other out.",
             {"old_names": [("C0113", "unneeded-not")]},
         )
     }