DOC: More fixups

Author: TomAugspurger

doc/source/whatsnew/v0.20.0.txt

@@ -1363,7 +1363,7 @@ If indicated, a deprecation warning will be issued if you reference theses modul
     "pandas._testing", "pandas.util.libtesting", ""
     "pandas._window", "pandas.core.libwindow", ""
 
-- The function :func:`~pandas.api.type.union_categoricals` is now importable from ``pandas.api.types``, formerly from ```pandas.types.concat`` (:issue:`15998`)
+- The function :func:`~pandas.api.types.union_categoricals` is now importable from ``pandas.api.types``, formerly from ``pandas.types.concat`` (:issue:`15998`)
 
 .. _whatsnew_0200.privacy.deprecate_plotting:
 

pandas/core/generic.py

@@ -4223,8 +4223,8 @@ def groupby(self, by=None, axis=0, level=None, as_index=True, sort=True,
             index. If a dict or Series is passed, the Series or dict VALUES
             will be used to determine the groups (the Series' values are first
             aligned; see ``.align()`` method). If an ndarray is passed, the
-            values as-is determine the groups. A str or list of strs maybe be
-            used used to group by the columns in ``self``.
+            values are used as-is determine the groups. A str or list of strs
+            may be passed to group by the columns in ``self``
         axis : int, default 0
         level : int, level name, or sequence of such, default None
             If the axis is a MultiIndex (hierarchical), group by a particular