add doc

Author: charlesdong1991

doc/source/whatsnew/v0.24.1.rst

@@ -22,6 +22,7 @@ Fixed Regressions
 
 - Bug in :meth:`DataFrame.itertuples` with ``records`` orient raising an ``AttributeError`` when the ``DataFrame`` contained more than 255 columns (:issue:`24939`)
 - Bug in :meth:`DataFrame.itertuples` orient converting integer column names to strings prepended with an underscore (:issue:`24940`)
+- Bug in :meth:`to_string` with ``index`` set to ``False``, leading space is added. (:issue:`24980`)
 
 .. _whatsnew_0241.enhancements: