ERR: improve exception message for Series.replace (#62686)

Author: jbrockmendel

pandas/core/generic.py

@@ -7627,8 +7627,8 @@ def replace(
                     # Operate column-wise
                     if self.ndim == 1:
                         raise ValueError(
-                            "Series.replace cannot use dict-like to_replace "
-                            "and non-None value"
+                            "Series.replace cannot specify both a dict-like "
+                            "'to_replace' and a 'value'"
                         )
                     mapping = {
                         col: (to_rep, value) for col, to_rep in to_replace.items()

pandas/tests/series/methods/test_replace.py

@@ -486,7 +486,9 @@ def test_replace_only_one_dictlike_arg(self, fixed_now_ts):
         ser = pd.Series([1, 2, "A", fixed_now_ts, True])
         to_replace = {0: 1, 2: "A"}
         value = "foo"
-        msg = "Series.replace cannot use dict-like to_replace and non-None value"
+        msg = (
+            "Series.replace cannot specify both a dict-like 'to_replace' and a 'value'"
+        )
         with pytest.raises(ValueError, match=msg):
             ser.replace(to_replace, value)