whatsnew v0.21.0.txt typos (pandas-dev#16742)

doc/source/whatsnew/v0.21.0.txt

@@ -22,8 +22,8 @@ New features
 
 - Support for `PEP 519 -- Adding a file system path protocol
   <https://www.python.org/dev/peps/pep-0519/>`_ on most readers and writers (:issue:`13823`)
-- Added `__fspath__` method to :class`:pandas.HDFStore`, :class:`pandas.ExcelFile`,
-  and :class:`pandas.ExcelWriter` to work properly with the file system path protocol (:issue:`13823`)
+- Added ``__fspath__`` method to :class:`~pandas.HDFStore`, :class:`~pandas.ExcelFile`,
+  and :class:`~pandas.ExcelWriter` to work properly with the file system path protocol (:issue:`13823`)
 
 .. _whatsnew_0210.enhancements.other:
 
@@ -33,12 +33,12 @@ Other Enhancements
 - The ``validate`` argument for :func:`merge` function now checks whether a merge is one-to-one, one-to-many, many-to-one, or many-to-many. If a merge is found to not be an example of specified merge type, an exception of type ``MergeError`` will be raised. For more, see :ref:`here <merging.validation>` (:issue:`16270`)
 - ``Series.to_dict()`` and ``DataFrame.to_dict()`` now support an ``into`` keyword which allows you to specify the ``collections.Mapping`` subclass that you would like returned.  The default is ``dict``, which is backwards compatible. (:issue:`16122`)
 - ``RangeIndex.append`` now returns a ``RangeIndex`` object when possible (:issue:`16212`)
-- ``Series.rename_axis()`` and ``DataFrame.rename_axis()`` with ``inplace=True`` now return None while renaming the axis inplace. (:issue:`15704`)
-- :func:`to_pickle` has gained a protocol parameter (:issue:`16252`). By default, this parameter is set to `HIGHEST_PROTOCOL <https://docs.python.org/3/library/pickle.html#data-stream-format>`__
-- :func:`api.types.infer_dtype` now infers decimals. (:issue: `15690`)
+- ``Series.rename_axis()`` and ``DataFrame.rename_axis()`` with ``inplace=True`` now return ``None`` while renaming the axis inplace. (:issue:`15704`)
+- :func:`to_pickle` has gained a ``protocol`` parameter (:issue:`16252`). By default, this parameter is set to `HIGHEST_PROTOCOL <https://docs.python.org/3/library/pickle.html#data-stream-format>`__
+- :func:`api.types.infer_dtype` now infers decimals. (:issue:`15690`)
 - :func:`read_feather` has gained the ``nthreads`` parameter for multi-threaded operations (:issue:`16359`)
-- :func:`DataFrame.clip()` and :func: `Series.cip()` have gained an inplace argument. (:issue: `15388`)
-- :func:`crosstab` has gained a ``margins_name`` parameter to define the name of the row / column that will contain the totals when margins=True. (:issue:`15972`)
+- :func:`DataFrame.clip()` and :func: `Series.clip()` have gained an inplace argument. (:issue:`15388`)
+- :func:`crosstab` has gained a ``margins_name`` parameter to define the name of the row / column that will contain the totals when ``margins=True``. (:issue:`15972`)
 
 .. _whatsnew_0210.api_breaking:
 
@@ -98,13 +98,13 @@ Conversion
 Indexing
 ^^^^^^^^
 
-- When called with a null slice (e.g. ``df.iloc[:]``), the``iloc`` and ``loc`` indexers return a shallow copy of the original object. Previously they returned the original object. (:issue:`13873`).
+- When called with a null slice (e.g. ``df.iloc[:]``), the ``.iloc`` and ``.loc`` indexers return a shallow copy of the original object. Previously they returned the original object. (:issue:`13873`).
 
 
 I/O
 ^^^
 
-- Bug in ``pd.read_csv()`` in which non integer values for the header argument generated an unhelpful / unrelated error message (:issue:`16338`)
+- Bug in :func:`read_csv` in which non integer values for the header argument generated an unhelpful / unrelated error message (:issue:`16338`)
 
 
 Plotting
@@ -114,7 +114,7 @@ Plotting
 
 Groupby/Resample/Rolling
 ^^^^^^^^^^^^^^^^^^^^^^^^
-- Bug in ``DataFrame.resample().size()`` where an empty DataFrame did not return a Series (:issue:`14962`)
+- Bug in ``DataFrame.resample().size()`` where an empty ``DataFrame`` did not return a ``Series`` (:issue:`14962`)