DOC: Minor formatting fixups to get rid of doc build warnings. (#6363)

Minor formatting fixups to get rid of doc build warnings.

5 files changed, 8 insertions, 8 deletions

diff --git a/doc/conf.py b/doc/conf.py
index 4059015c..efdb0cea 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -136,7 +136,7 @@ html_theme_options = {
     ],
     "external_links": [{"name": "Guides", "url": "https://networkx.org/nx-guides/"}],
     "navbar_end": ["theme-switcher", "navbar-icon-links", "version"],
-    "page_sidebar_items": ["search-field", "page-toc", "edit-this-page"],
+    "secondary_sidebar_items": ["search-field", "page-toc", "edit-this-page"],
     "header_links_before_dropdown": 7,
 }
 html_sidebars = {
diff --git a/doc/developer/new_contributor_faq.rst b/doc/developer/new_contributor_faq.rst
index 9c289783..1bfefdb1 100644
--- a/doc/developer/new_contributor_faq.rst
+++ b/doc/developer/new_contributor_faq.rst
@@ -110,7 +110,7 @@ For example, let's say you are interested in making a change to the
 where it is defined. In an IPython terminal, you can use ``?`` --- the source file is
 listed in the ``File:`` field:
 
-.. code-block:: ipython
+.. code-block:: ipython3
 
    In [1]: import networkx as nx
    In [2]: nx.kamada_kawai_layout?
diff --git a/doc/developer/nxeps/nxep-0004.rst b/doc/developer/nxeps/nxep-0004.rst
index 8d6912f9..e91968b3 100644
--- a/doc/developer/nxeps/nxep-0004.rst
+++ b/doc/developer/nxeps/nxep-0004.rst
@@ -21,12 +21,12 @@ that includes support for `numpy.random` and the Python built-in `random` module
 preferred package for random number generation.
 NumPy introduced a new interface in the `numpy.random` package in NumPy version
 1.17.
-According to :doc:`NEP19 <nep-0019-rng-policy>`, the new interface based on
+According to :external+neps:doc:`NEP19 <nep-0019-rng-policy>`, the new interface based on
 `numpy.random.Generator`
 is recommended over the legacy `numpy.random.RandomState` as the former has
 `better statistical properties <https://www.pcg-random.org/index.html>`_,
-:doc:`more features <reference/random/new-or-different>`,
-and :doc:`improved performance <reference/random/performance>`.
+:external+numpy:doc:`more features <reference/random/new-or-different>`,
+and :external+numpy:doc:`improved performance <reference/random/performance>`.
 This NXEP proposes a strategy for adopting `numpy.random.Generator` as the
 **default** interface for random number generation within NetworkX.
 
diff --git a/doc/developer/projects.rst b/doc/developer/projects.rst
index 49f3f239..38f23235 100644
--- a/doc/developer/projects.rst
+++ b/doc/developer/projects.rst
@@ -47,7 +47,7 @@ Completed Projects
 - `VF2++ algorithm for graph isomorphism`_
     - Program: Google Summer of Code 2022
     - Contributor: `@kpetridis24 <https://github.com/kpetridis24/>`__
-    - Link to Proposal: `GSoC 2022: VF2++ Algorithm <https://github.com/networkx/archive/blob/main/proposals-gsoc/GSoC-2022-VF2plusplus-isomorphism.pdf`_
+    - Link to Proposal: `GSoC 2022: VF2++ Algorithm <https://github.com/networkx/archive/blob/main/proposals-gsoc/GSoC-2022-VF2plusplus-isomorphism.pdf>`_
 
 - `Louvain community detection algorithm`_ 
     - Program: Google Summer of Code 2021
diff --git a/doc/reference/algorithms/centrality.rst b/doc/reference/algorithms/centrality.rst
index 92ac0292..b7d40017 100644
--- a/doc/reference/algorithms/centrality.rst
+++ b/doc/reference/algorithms/centrality.rst
@@ -150,8 +150,8 @@ VoteRank
    voterank
 
 Laplacian
---------
+---------
 .. autosummary::
    :toctree: generated/
 
-   laplacian_centrality
\ No newline at end of file
+   laplacian_centrality