Fix broken links

ksunden · tacaswell · commit 5353f098a5d6 · 2023-02-10T17:23:44.000-05:00
diff --git a/doc/devel/development_setup.rst b/doc/devel/development_setup.rst
@@ -72,7 +72,7 @@ Change into this directory before continuing::
 
   * `Git documentation <https://git-scm.com/doc>`_
   * `GitHub-Contributing to a Project <https://git-scm.com/book/en/v2/GitHub-Contributing-to-a-Project>`_
-  * `Introduction to GitHub <https://lab.github.com/githubtraining/introduction-to-github>`_
+  * `GitHub Skills <https://skills.github.com/>`_
   * :ref:`using-git`
   * :ref:`git-resources`
   * `Installing git <https://git-scm.com/book/en/v2/Getting-Started-Installing-Git>`_
diff --git a/doc/devel/development_workflow.rst b/doc/devel/development_workflow.rst
@@ -130,15 +130,13 @@ In more detail
    ``git commit -am 'A commit message'``.  Note the ``-am`` options to
    ``commit``. The ``m`` flag just signals that you're going to type a
    message on the command line.  The ``a`` flag — you can just take on
-   faith — or see `why the -a flag?`_ — and the helpful use-case
-   description in the `tangled working copy problem`_. The
+   faith — or see `why the -a flag?`_. The
    `git commit <https://git-scm.com/docs/git-commit>`_ manual page might also be
    useful.
 #. To push the changes up to your forked repo on GitHub, do a ``git
    push``.
 
 .. _why the -a flag?: http://gitready.com/beginner/2009/01/18/the-staging-area.html
-.. _tangled working copy problem: http://2ndscale.com/rtomayko/2008/the-thing-about-git
 
 
 Open a pull request
diff --git a/doc/users/explain/figures.rst b/doc/users/explain/figures.rst
@@ -52,7 +52,7 @@ MacOS backend as well.  These are typically chosen either in the user's
 ``matplotlib.use('QtAgg')`` at the beginning of a session or script.
 
 When run from a script, or interactively (e.g. from an
-`iPython shell <https://https://ipython.readthedocs.io/en/stable/>`_) the Figure
+`iPython shell <https://ipython.readthedocs.io/en/stable/>`_) the Figure
 will not be shown until we call ``plt.show()``. The Figure will appear in
 a new GUI window, and usually will have a toolbar with Zoom, Pan, and other tools
 for interacting with the Figure.  By default, ``plt.show()`` blocks
diff --git a/lib/matplotlib/path.py b/lib/matplotlib/path.py
@@ -937,7 +937,7 @@ def arc(cls, theta1, theta2, n=None, is_wedge=False):
 
            Masionobe, L.  2003.  `Drawing an elliptical arc using
            polylines, quadratic or cubic Bezier curves
-           <http://www.spaceroots.org/documents/ellipse/index.html>`_.
+           <https://web.archive.org/web/20190318044212/http://www.spaceroots.org/documents/ellipse/index.html>`_.
         """
         halfpi = np.pi * 0.5
 
