Fix broken Sphinx Links

docs/notes/styleguide.rst

@@ -31,7 +31,7 @@ Strive to keep any contributions relevant to the :ref:`purpose of The Guide
   relate to Python development.
 * Prefer to link to other sources if the information is already out there.
   Be sure to describe what and why you are linking.
-* `Cite <http://sphinx.pocoo.org/rest.html?highlight=citations#citations>`_
+* `Cite <https://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html#citations>`_
   references where needed.
 * If a subject isn't directly relevant to Python, but useful in conjunction
   with Python (e.g., Git, GitHub, Databases), reference by linking to useful
@@ -146,14 +146,14 @@ Externally Linking
 
       Sphinx_ is used to document Python.
 
-      .. _Sphinx: http://sphinx.pocoo.org
+      .. _Sphinx: https://www.sphinx-doc.org
 
 * Prefer to use descriptive labels with inline links instead of leaving bare
   links:
 
   .. code-block:: rest
 
-      Read the `Sphinx Tutorial <http://sphinx.pocoo.org/tutorial.html>`_
+      Read the `Sphinx Tutorial <https://www.sphinx-doc.org/en/master/usage/quickstart.html>`_
 
 * Avoid using labels such as "click here", "this", etc., preferring
   descriptive labels (SEO worthy) instead.
@@ -164,7 +164,7 @@ Linking to Sections in The Guide
 ********************************
 
 To cross-reference other parts of this documentation, use the `:ref:
-<http://sphinx.pocoo.org/markup/inline.html#cross-referencing-arbitrary-locations>`_
+<https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html#role-ref>`_
 keyword and labels.
 
 To make reference labels more clear and unique, always add a ``-ref`` suffix:
@@ -182,7 +182,7 @@ Notes and Warnings
 ******************
 
 Make use of the appropriate `admonitions directives
-<http://sphinx.pocoo.org/rest.html#directives>`_ when making notes.
+<https://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html#directives>`_ when making notes.
 
 Notes:
 
@@ -205,7 +205,7 @@ TODOs
 *****
 
 Please mark any incomplete areas of The Guide with a `todo directive
-<http://sphinx.pocoo.org/ext/todo.html?highlight=todo#directive-todo>`_. To
+<https://www.sphinx-doc.org/en/master/usage/extensions/todo.html>`_. To
 avoid cluttering the :ref:`todo-list-ref`, use a single ``todo`` for stub
 documents or large incomplete sections.
 

docs/writing/documentation.rst

@@ -85,7 +85,7 @@ structured and easily readable documentation for your project.
     for general project documentation. This Guide is built with
     Sphinx_ and is hosted on `Read The Docs`_
 
-.. _Sphinx: http://sphinx.pocoo.org
+.. _Sphinx: https://www.sphinx-doc.org
 .. _Read The Docs: http://readthedocs.org
 
 .. _restructuredtext-ref:
@@ -100,7 +100,7 @@ The `reStructuredText Primer`_ and the `reStructuredText Quick
 Reference`_ should help you familiarize yourself with its syntax.
 
 .. _reStructuredText: http://docutils.sourceforge.net/rst.html
-.. _reStructuredText Primer: http://sphinx.pocoo.org/rest.html
+.. _reStructuredText Primer: https://www.sphinx-doc.org/en/master/usage/restructuredtext/basics.html
 .. _reStructuredText Quick Reference: http://docutils.sourceforge.net/docs/user/rst/quickref.html