[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

pandas/io/parsers/base_parser.py

@@ -614,7 +614,7 @@ def _check_data_length(
         columns: list of column names
         data: list of array-likes containing the data column-wise.
         """
-        if columns and len(data)!=len(columns):
+        if columns and len(data) != len(columns):
             warnings.warn(
                 f"Length of header or names ({len(columns)}) does not match number of "
                 f"fields in line ({len(data)}). Extra field will be dropped.",

pandas/tests/io/parser/test_python_parser_only.py

@@ -333,9 +333,7 @@ def test_on_bad_lines_extra_fields_warns(python_parser_only):
     def line_fixer(_line):
         return ["1", "2", "3", "4", "5"]
 
-    expected_warning = (
-            r"Length of header or names \(3\) does not match number of fields in line \(5\)\. Extra field will be dropped\."
-            )
+    expected_warning = r"Length of header or names \(3\) does not match number of fields in line \(5\)\. Extra field will be dropped\."
 
     for index_col in [None, 0]:
         with pytest.warns(ParserWarning, match=expected_warning):