More warnings (#21808)

Author: TomAugspurger

doc/source/merging.rst

@@ -245,7 +245,7 @@ need to be:
 
 .. ipython:: python
 
-   result = df1.append(df4)
+   result = df1.append(df4, sort=False)
 
 .. ipython:: python
    :suppress:
@@ -285,7 +285,7 @@ do this, use the ``ignore_index`` argument:
 
 .. ipython:: python
 
-   result = pd.concat([df1, df4], ignore_index=True)
+   result = pd.concat([df1, df4], ignore_index=True, sort=False)
 
 .. ipython:: python
    :suppress:
@@ -299,7 +299,7 @@ This is also a valid argument to :meth:`DataFrame.append`:
 
 .. ipython:: python
 
-   result = df1.append(df4, ignore_index=True)
+   result = df1.append(df4, ignore_index=True, sort=False)
 
 .. ipython:: python
    :suppress:

doc/source/whatsnew/v0.24.0.txt

@@ -100,27 +100,33 @@ Creating a ``Tick`` object (:class:`Day`, :class:`Hour`, :class:`Minute`,
 `normalize=True` is no longer supported.  This prevents unexpected behavior
 where addition could fail to be monotone or associative.  (:issue:`21427`)
 
-.. ipython:: python
+*Previous Behavior*:
 
-    ts = pd.Timestamp('2018-06-11 18:01:14')
-    ts
-    tic = pd.offsets.Hour(n=2, normalize=True)
-    tic
+.. code-block:: ipython
 
-Previous Behavior:
 
-.. code-block:: ipython
+   In [2]: ts = pd.Timestamp('2018-06-11 18:01:14')
 
-    In [4]: ts + tic
-    Out [4]: Timestamp('2018-06-11 00:00:00')
+   In [3]: ts
+   Out[3]: Timestamp('2018-06-11 18:01:14')
 
-    In [5]: ts + tic + tic + tic == ts + (tic + tic + tic)
-    Out [5]: False
+   In [4]: tic = pd.offsets.Hour(n=2, normalize=True)
+      ...:
 
-Current Behavior:
+   In [5]: tic
+   Out[5]: <2 * Hours>
+
+   In [6]: ts + tic
+   Out[6]: Timestamp('2018-06-11 00:00:00')
+
+   In [7]: ts + tic + tic + tic == ts + (tic + tic + tic)
+   Out[7]: False
+
+*Current Behavior*:
 
 .. ipython:: python
 
+    ts = pd.Timestamp('2018-06-11 18:01:14')
     tic = pd.offsets.Hour(n=2)
     ts + tic + tic + tic == ts + (tic + tic + tic)
 

pandas/core/strings.py

@@ -2556,7 +2556,7 @@ def encode(self, encoding, errors="strict"):
         result = str_encode(self._data, encoding, errors)
         return self._wrap_result(result)
 
-    _shared_docs['str_strip'] = ("""
+    _shared_docs['str_strip'] = (r"""
     Remove leading and trailing characters.
 
     Strip whitespaces (including newlines) or a set of specified characters