Add more code blocks in docstrings.

scrapy/link.py

@@ -9,7 +9,9 @@ its documentation in: docs/topics/link-extractors.rst
 class Link:
     """Link objects represent an extracted link by the LinkExtractor.
 
-    Using the anchor tag sample below to illustrate the parameters::
+    Using the anchor tag sample below to illustrate the parameters:
+
+    .. code-block:: html
 
             <a href="https://example.com/nofollow.html#foo" rel="nofollow">Dont follow this one</a>
 

scrapy/logformatter.py

@@ -58,18 +58,20 @@ class LogFormatter:
     logging an action the method must return ``None``.
 
     Here is an example on how to create a custom log formatter to lower the severity level of
-    the log message when an item is dropped from the pipeline::
+    the log message when an item is dropped from the pipeline:
 
-            class PoliteLogFormatter(logformatter.LogFormatter):
-                def dropped(self, item, exception, response, spider):
-                    return {
-                        'level': logging.INFO, # lowering the level from logging.WARNING
-                        'msg': "Dropped: %(exception)s" + os.linesep + "%(item)s",
-                        'args': {
-                            'exception': exception,
-                            'item': item,
-                        }
-                    }
+    .. code-block:: python
+
+        class PoliteLogFormatter(logformatter.LogFormatter):
+            def dropped(self, item, exception, response, spider):
+                return {
+                    "level": logging.INFO,  # lowering the level from logging.WARNING
+                    "msg": "Dropped: %(exception)s" + os.linesep + "%(item)s",
+                    "args": {
+                        "exception": exception,
+                        "item": item,
+                    },
+                }
     """
 
     def crawled(

scrapy/utils/deprecate.py

@@ -43,15 +43,18 @@ def create_deprecated_class(
     It can be used to rename a base class in a library. For example, if we
     have
 
-        class OldName(SomeClass):
-            # ...
+    .. code-block:: python
 
-    and we want to rename it to NewName, we can do the following::
+        class OldName(SomeClass): ...
 
-        class NewName(SomeClass):
-            # ...
+    and we want to rename it to NewName, we can do the following:
 
-        OldName = create_deprecated_class('OldName', NewName)
+    .. code-block:: python
+
+        class NewName(SomeClass): ...
+
+
+        OldName = create_deprecated_class("OldName", NewName)
 
     Then, if user class inherits from OldName, warning is issued. Also, if
     some code uses ``issubclass(sub, OldName)`` or ``isinstance(sub(), OldName)``