fix display in series

Author: jorisvandenbossche

pandas/io/formats/format.py

@@ -67,7 +67,6 @@
     ExtensionArray,
     TimedeltaArray,
 )
-from pandas.core.arrays.string_ import StringDtype
 from pandas.core.base import PandasObject
 import pandas.core.common as com
 from pandas.core.indexes.api import (
@@ -1218,8 +1217,6 @@ def _format(x):
                 return self.na_rep
             elif isinstance(x, PandasObject):
                 return str(x)
-            elif isinstance(x, StringDtype):
-                return repr(x)
             else:
                 # object dtype
                 return str(formatter(x))

pandas/tests/io/formats/test_to_string.py

@@ -777,9 +777,9 @@ def test_to_string_string_dtype(self):
         result = df.dtypes.to_string()
         expected = dedent(
             """\
-            x    string[pyarrow]
-            y     string[python]
-            z     int64[pyarrow]"""
+            x            string
+            y            string
+            z    int64[pyarrow]"""
         )
         assert result == expected