CLN: Format doc code blocks

doc/source/development/code_style.rst

@@ -172,5 +172,6 @@ Reading from a url
 .. code-block:: python
 
     from pandas.io.common import urlopen
-    with urlopen('http://www.google.com') as url:
+
+    with urlopen("http://www.google.com") as url:
         raw_text = url.read()

doc/source/development/developer.rst

@@ -71,11 +71,13 @@ descriptor format for these as is follows:
 .. code-block:: python
 
    index = pd.RangeIndex(0, 10, 2)
-   {'kind': 'range',
-    'name': index.name,
-    'start': index.start,
-    'stop': index.stop,
-    'step': index.step}
+   {
+       "kind": "range",
+       "name": index.name,
+       "start": index.start,
+       "stop": index.stop,
+       "step": index.step,
+   }
 
 Other index types must be serialized as data columns along with the other
 DataFrame columns. The metadata for these is a string indicating the name of

doc/source/development/internals.rst

@@ -68,8 +68,9 @@ integer **codes** (until version 0.24 named *labels*), and the level **names**:
 
 .. ipython:: python
 
-   index = pd.MultiIndex.from_product([range(3), ['one', 'two']],
-                                      names=['first', 'second'])
+   index = pd.MultiIndex.from_product(
+       [range(3), ["one", "two"]], names=["first", "second"]
+   )
    index
    index.levels
    index.codes