CLN: run flynt to use f-strings (mechanical)

Author: akx

pandas/core/arraylike.py

@@ -304,8 +304,7 @@ def array_ufunc(self, ufunc: np.ufunc, method: str, *inputs: Any, **kwargs: Any)
             # well. Previously this raised an internal ValueError. We might
             # support it someday, so raise a NotImplementedError.
             raise NotImplementedError(
-                "Cannot apply ufunc {} to mixed DataFrame and Series "
-                "inputs.".format(ufunc)
+                f"Cannot apply ufunc {ufunc} to mixed DataFrame and Series inputs."
             )
         axes = self.axes
         for obj in alignable[1:]:

pandas/tests/io/excel/test_openpyxl.py

@@ -269,7 +269,7 @@ def test_to_excel_with_openpyxl_engine(ext):
         df2 = DataFrame({"B": np.linspace(1, 20, 10)})
         df = pd.concat([df1, df2], axis=1)
         styled = df.style.applymap(
-            lambda val: "color: %s" % ("red" if val < 0 else "black")
+            lambda val: f"color: {'red' if val < 0 else 'black'}"
         ).highlight_max()
 
         styled.to_excel(filename, engine="openpyxl")

pandas/tests/io/test_fsspec.py

@@ -218,7 +218,7 @@ def test_from_s3_csv(s3_resource, tips_file, s3so):
 @td.skip_if_no("s3fs")
 def test_s3_protocols(s3_resource, tips_file, protocol, s3so):
     tm.assert_equal(
-        read_csv("%s://pandas-test/tips.csv" % protocol, storage_options=s3so),
+        read_csv(f"{protocol}://pandas-test/tips.csv", storage_options=s3so),
         read_csv(tips_file),
     )