Update wording in docs

Author: avinashpancham

doc/source/whatsnew/v1.2.0.rst

@@ -268,7 +268,7 @@ Deprecations
 - Deprecated :meth:`Index.is_all_dates` (:issue:`27744`)
 - Deprecated automatic alignment on comparison operations between :class:`DataFrame` and :class:`Series`, do ``frame, ser = frame.align(ser, axis=1, copy=False)`` before e.g. ``frame == ser`` (:issue:`28759`)
 - :meth:`Rolling.count` with ``min_periods=None`` will default to the size of the window in a future version (:issue:`31302`)
-- Deprecate use of strings denoting units with 'M', 'Y', 'm' and 'y' in :func:`~pandas.to_timedelta` (:issue:`36666`)
+- Deprecate use of strings denoting units with 'M', 'Y', 'm' or 'y' in :func:`~pandas.to_timedelta` (:issue:`36666`)
 
 .. ---------------------------------------------------------------------------
 

pandas/core/tools/timedeltas.py

@@ -29,7 +29,7 @@ def to_timedelta(arg, unit=None, errors="raise"):
         The data to be converted to timedelta.
 
         .. deprecated:: 1.2
-            Strings denoting units with 'M', 'Y', 'm' and 'y' do not represent
+            Strings denoting units with 'M', 'Y', 'm' or 'y' do not represent
             unambiguous timedelta values durations and will removed in a future
             version
 
@@ -129,7 +129,7 @@ def to_timedelta(arg, unit=None, errors="raise"):
             )
         elif arg.upper().endswith(" M") or arg.upper().endswith(" Y"):
             warnings.warn(
-                "Denoting units with 'M', 'Y', 'm' and 'y' do not represent unambiguous"
+                "Denoting units with 'M', 'Y', 'm' or 'y' do not represent unambiguous"
                 " timedelta values durations and will removed in a future version",
                 FutureWarning,
                 stacklevel=2,