use Mapping instead of dict as it is invariant

Author: MarcoGorelli

tests/test_series.py

@@ -3,6 +3,7 @@
 from collections.abc import (
     Iterable,
     Iterator,
+    Mapping,
     Sequence,
 )
 import datetime
@@ -1658,10 +1659,9 @@ def test_string_accessors():
     check(assert_type(s.str.strip(), "pd.Series[str]"), pd.Series, str)
     check(assert_type(s.str.swapcase(), "pd.Series[str]"), pd.Series, str)
     check(assert_type(s.str.title(), "pd.Series[str]"), pd.Series, str)
+    translation_table: Mapping = str.maketrans({"ñ": "n", "ç": "c"})
     check(
-        assert_type(
-            s.str.translate(str.maketrans({"ñ": "n", "ç": "c"})), "pd.Series[str]"
-        ),
+        assert_type(s.str.translate(translation_table), "pd.Series[str]"),
         pd.Series,
         str,
     )