Add whatsnew

Author: kinow

doc/source/whatsnew/v0.25.0.rst

@@ -1171,6 +1171,7 @@ I/O
 - Bug in :meth:`to_msgpack` and :meth:`read_msgpack` which would raise a ``ValueError`` rather than a ``FileNotFoundError`` for an invalid path (:issue:`27160`)
 - Fixed bug in :meth:`DataFrame.to_parquet` which would raise a ``ValueError`` when the dataframe had no columns (:issue:`27339`)
 - Allow parsing of :class:`PeriodDtype` columns when using :func:`read_csv` (:issue:`26934`)
+-
 
 Plotting
 ^^^^^^^^

doc/source/whatsnew/v0.25.2.rst

@@ -64,7 +64,7 @@ I/O
 
 - Fix regression in notebook display where <th> tags not used for :attr:`DataFrame.index` (:issue:`28204`).
 - Regression in :meth:`~DataFrame.to_csv` where writing a :class:`Series` or :class:`DataFrame` indexed by an :class:`IntervalIndex` would incorrectly raise a ``TypeError`` (:issue:`28210`)
--
+- Bug in :meth:`DataFrame.to_csv` where values were truncated when the length of ``na_rep`` was shorter than the text input data. (:issue:`25099`)
 -
 
 Plotting