fix failing doctest

MarcoGorelli · MarcoGorelli · commit 45813853c70f · 2020-09-19T17:26:29.000+01:00
diff --git a/pandas/core/series.py b/pandas/core/series.py
@@ -4614,7 +4614,7 @@ def replace(
             --------------    -----
             1000000 non-null  object
             dtypes: object(1)
-            memory usage: 62.9 MB"""
+            memory usage: 55.3 MB"""
         ),
         see_also_sub=(
             """
