DOC: Minor addition to str.split (pandas-dev#46027)

* DOC: Minor addition to str.split

* Make Series uppercase and NaN plural

* example suggestion for method behaviour

* allign Series values in hopes of passing tests

* fixed lowercase Nan typing error

pandas/core/strings/accessor.py

@@ -1880,6 +1880,7 @@ def encode(self, encoding, errors="strict"):
 
     Strip whitespaces (including newlines) or a set of specified characters
     from each string in the Series/Index from %(side)s.
+    Replaces any non-strings in Series with NaNs.
     Equivalent to :meth:`str.%(method)s`.
 
     Parameters
@@ -1901,40 +1902,50 @@ def encode(self, encoding, errors="strict"):
 
     Examples
     --------
-    >>> s = pd.Series(['1. Ant.  ', '2. Bee!\n', '3. Cat?\t', np.nan])
+    >>> s = pd.Series(['1. Ant.  ', '2. Bee!\n', '3. Cat?\t', np.nan, 10, True])
     >>> s
     0    1. Ant.
     1    2. Bee!\n
     2    3. Cat?\t
     3          NaN
+    4           10
+    5         True
     dtype: object
 
     >>> s.str.strip()
     0    1. Ant.
     1    2. Bee!
     2    3. Cat?
     3        NaN
+    4        NaN
+    5        NaN
     dtype: object
 
     >>> s.str.lstrip('123.')
     0    Ant.
     1    Bee!\n
     2    Cat?\t
     3       NaN
+    4       NaN
+    5       NaN
     dtype: object
 
     >>> s.str.rstrip('.!? \n\t')
     0    1. Ant
     1    2. Bee
     2    3. Cat
     3       NaN
+    4       NaN
+    5       NaN
     dtype: object
 
     >>> s.str.strip('123.!? \n\t')
     0    Ant
     1    Bee
     2    Cat
     3    NaN
+    4    NaN
+    5    NaN
     dtype: object
     """