CLN: review fixes

Author: Ben Russert

pandas/tests/io/formats/test_to_csv.py

@@ -568,17 +568,16 @@ def test_to_csv_compression(self, compression_only,
 def test_csv_formatter_line_terminator_default(monkeypatch):
     # see GH #23608
     # ensure default line_terminator used is os.linesep
-    df = tm.makeDataFrame()
+    from pandas.io.formats.csvs import CSVFormatter
+    df = DataFrame()
 
     with monkeypatch.context() as m:
         # fake default os.linesep to look like windows
         m.setattr(os, 'linesep', '\r\n')
         assert os.linesep == '\r\n'
-        # import within this context so it uses the patched os.linesep
-        from pandas.io.formats.csvs import CSVFormatter
+
+        formatter_with_default = CSVFormatter(DataFrame())
+        assert formatter_with_default.line_terminator == os.linesep
 
         formatter_with_argument = CSVFormatter(df, line_terminator='\r')
         assert formatter_with_argument.line_terminator == '\r'
-
-        formatter_with_default = CSVFormatter(df)
-        assert formatter_with_default.line_terminator == os.linesep