fix linting error

Author: charlesdong1991

pandas/io/formats/csvs.py

@@ -50,8 +50,8 @@ def __init__(self, obj, path_or_buf=None, sep=",", na_rep='',
 
         self.header = header
         self.index = index
-        # if index label is not explicitly called, index label is True if header
-        # or index is not False; otherwise, index label is set to False
+        # if index label is not explicitly called, index label is True if
+        # header or index is not False; otherwise, index label is set to False
         if index_label is None:
             if self.header is False or self.header is None or not self.index:
                 self.index_label = False