renaming single character variable

Author: tegardp

pandas/tests/io/parser/common/test_common_basic.py

@@ -827,11 +827,11 @@ def test_malformed_second_line(all_parsers):
 
 def test_read_table_posargs_deprecation(all_parsers):
     # https://github.com/pandas-dev/pandas/issues/41485
-    f = StringIO("a\tb\n1\t2")
+    data = StringIO("a\tb\n1\t2")
     parser = all_parsers
     msg = (
         "In a future version of pandas all arguments of read_table "
         "except for the argument 'filepath_or_buffer' will be keyword-only"
     )
     with tm.assert_produces_warning(FutureWarning, match=msg):
-        parser.read_table(f, " ")
+        parser.read_table(data, " ")