Updated doc/source/whatsnew/v2.0.0.rst to reflect deprecated behaviour of 'delimiter' option to 'read_fwf()'.

Signed-off-by: Ronald Barnes <[email protected]>

Author: RonaldBarnes

doc/source/whatsnew/v2.0.0.rst

@@ -622,6 +622,7 @@ Other API changes
 - Loading a JSON file with duplicate columns using ``read_json(orient='split')`` renames columns to avoid duplicates, as :func:`read_csv` and the other readers do (:issue:`50370`)
 - The levels of the index of the :class:`Series` returned from ``Series.sparse.from_coo`` now always have dtype ``int32``. Previously they had dtype ``int64`` (:issue:`50926`)
 - :func:`to_datetime` with ``unit`` of either "Y" or "M" will now raise if a sequence contains a non-round ``float`` value, matching the ``Timestamp`` behavior (:issue:`50301`)
+- :func:`read_fwf` preserves whitespace by default (:issue:`16772`)
 -
 
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@@ -638,6 +639,7 @@ Deprecations
 - :meth:`Index.holds_integer` has been deprecated. Use :func:`pandas.api.types.infer_dtype` instead (:issue:`50243`)
 - :meth:`Index.is_categorical` has been deprecated. Use :func:`pandas.api.types.is_categorical_dtype` instead (:issue:`50042`)
 - :meth:`Index.is_interval` has been deprecated. Use :func:`pandas.api.types.is_intterval_dtype` instead (:issue:`50042`)
+- Deprecated behaviour of :func:`read_fwf` `delimiter` option. Use option `keep_whitespace` and `whitespace_chars` instead
 -
 
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