solve 'check_category_order' description ends with '.' (#32358)

Author: tolhassianipar

pandas/_testing.py

@@ -1106,7 +1106,7 @@ def assert_series_equal(
     check_categorical : bool, default True
         Whether to compare internal Categorical exactly.
     check_category_order : bool, default True
-        Whether to compare category order of internal Categoricals
+        Whether to compare category order of internal Categoricals.
 
         .. versionadded:: 1.0.2
     obj : str, default 'Series'