diff --git a/docs/python/documentation.rst b/docs/python/documentation.rst
index 29c15bd..12193a3 100644
--- a/docs/python/documentation.rst
+++ b/docs/python/documentation.rst
@@ -102,8 +102,11 @@ Review the broken links in the ``_linkcheck/output.txt`` file:
 
 .. _readthedocs:
 
-Create a ReadTheDocs project
-----------------------------
+ReadTheDocs
+-----------
+
+Create a project
+~~~~~~~~~~~~~~~~
 
 #. Sign in to `ReadTheDocs <https://readthedocs.org/dashboard/>`__
 #. Click *Import a Project*
@@ -133,8 +136,8 @@ Create a ReadTheDocs project
    #. Uncheck *Active*
    #. Click *Save*
 
-Configure the ReadTheDocs project
----------------------------------
+Configure the project
+~~~~~~~~~~~~~~~~~~~~~
 
 .. tab-set::
 
@@ -160,8 +163,8 @@ Configure the ReadTheDocs project
 
    At present, Python 3.9 is used, because ReadTheDocs is not compatible with Python 3.10.
 
-Redirect a ReadTheDocs project
-------------------------------
+Redirect a project
+~~~~~~~~~~~~~~~~~~
 
 #. Replace ``docs/_templates/layout.html`` with the below, replacing ``SUBDOMAIN``:
 
diff --git a/docs/python/i18n.rst b/docs/python/i18n.rst
index 8731f30..8df6ad2 100644
--- a/docs/python/i18n.rst
+++ b/docs/python/i18n.rst
@@ -37,7 +37,7 @@ See `Adding resources in bulk <https://developers.transifex.com/docs/cli#adding-
 
    For reference, the equivalent with the old Python Transifex Client, replacing ``TXPROJECT`` and ``APP``, was:
 
-   .. code:: bash
+   .. code-block:: bash
 
       tx config mapping -r TXPROJECT.django -f APP/locale/en_US/LC_MESSAGES/django.po -s en_US -t PO 'APP/locale/<lang>/LC_MESSAGES/django.po'
 
@@ -46,54 +46,46 @@ Translate with Transifex
 
 Whenever text in the interface is added or updated, you must extract the strings to translate from the code files into PO files by running:
 
-.. grid:: 2
+.. code-block:: bash
+   :caption: Django
 
-   .. grid-item-card:: Django
+   django-admin makemessages -l en_US --no-obsolete
 
-      .. code:: bash
+.. code-block:: bash
+   :caption: Python (example)
 
-         django-admin makemessages -l en_US --no-obsolete
-
-   .. grid-item-card:: Python (example)
-
-      .. code:: bash
-
-         pybabel extract -F babel.cfg -o messages.pot .
-         pybabel update -i messages.pot -d locale
+   pybabel extract -F babel.cfg -o messages.pot .
+   pybabel update -i messages.pot -d locale
 
 Then, push the PO files to Transifex with:
 
-.. code:: bash
+.. code-block:: bash
 
    tx push -s
 
 If you made local changes to translations, push the translations to Transifex. For example:
 
-.. code:: bash
+.. code-block:: bash
 
    tx push -t -l en
 
 When ready, pull the translations from Transifex with:
 
-.. code:: bash
+.. code-block:: bash
 
    tx pull -f -a
 
 Then, compile the PO files to MO files with:
 
-.. grid:: 2
-
-   .. grid-item-card:: Django
-
-      .. code:: bash
-
-         python manage.py compilemessages
+.. code-block:: bash
+   :caption: Django
 
-   .. grid-item-card:: Python (example)
+   python manage.py compilemessages
 
-      .. code:: bash
+.. code-block:: bash
+   :caption: Python (example)
 
-         pybabel compile -f -d locale
+   pybabel compile -f -d locale
 
 Reference: Django `Translation <https://docs.djangoproject.com/en/4.2/topics/i18n/translation/>`__
 
diff --git a/docs/python/style_guide.rst b/docs/python/style_guide.rst
index 8d0f306..ef2fe23 100644
--- a/docs/python/style_guide.rst
+++ b/docs/python/style_guide.rst
@@ -76,7 +76,7 @@ Warnings
 
       The `warnings.catch_warnings(record=True) <https://docs.python.org/3/library/warnings.html#warnings.catch_warnings>`__ context manager catches instances of ``warnings.WarningMessage``, not instances of the original warning classes. To reissue a warning, you need to do, like in `Apache Airflow <https://github.com/apache/airflow/blob/main/airflow/utils/warnings.py>`__:
 
-      .. code:: python
+      .. code-block:: python
 
          warnings.warn_explicit(w.message, w.category, w.filename, w.lineno, source=w.source)
 
@@ -84,7 +84,7 @@ Warnings
 
       Because the additional required arguments are unavailable, you can't do:
 
-      .. code:: python
+      .. code-block:: python
 
          warnings.warn(category(w.message, var1, var2))  # var1 and var2 are indeterminable
 
diff --git a/docs/rust/index.rst b/docs/rust/index.rst
index 94e3b6e..07fc92b 100644
--- a/docs/rust/index.rst
+++ b/docs/rust/index.rst
@@ -30,6 +30,13 @@ Preferences
 
 .. Candidates for preferences https://github.com/open-contracting/cardinal-rs/issues/4
 
+Performance
+-----------
+
+.. seealso::
+
+   `coz <https://github.com/plasma-umass/coz>`__ profiler
+
 Code style
 ----------
 
@@ -151,14 +158,14 @@ If you're getting confusing compile errors, especially any involving type annota
 -  Your annotations are correct. If you change your code but don't change your annotations, the compiler might report errors that are distantly related to the misannotation.
 -  You duck type using trait objects: for example, ``Box<dyn Read>`` to use ``std::io:stdin()`` and ``File::open(file).unwrap()`` interchangeably. The compiler can't determine which traits are relevant across the two types.
 
-If errors relate to ownership, try:
+If errors relate to ownership, try using:
 
--  Using ``Arc<Mutex<T>>``, as discussed in sections `16.3 <https://doc.rust-lang.org/book/ch16-03-shared-state.html#atomic-reference-counting-with-arct>`__ and `20.2 <https://doc.rust-lang.org/book/ch20-02-multithreaded.html#sending-requests-to-threads-via-channels>`__ of *The Rust Programming Language*.
--  Using ``Option`` with ``take()``, as discussed in sections `17.3 <https://doc.rust-lang.org/book/ch17-03-oo-design-patterns.html#requesting-a-review-of-the-post-changes-its-state>`__ and `20.3 <https://doc.rust-lang.org/book/ch20-03-graceful-shutdown-and-cleanup.html#implementing-the-drop-trait-on-threadpool>`__ of *The Rust Programming Language*.
+-  ``Arc<Mutex<T>>``, as discussed in sections `16.3 <https://doc.rust-lang.org/book/ch16-03-shared-state.html#atomic-reference-counting-with-arct>`__ and `20.2 <https://doc.rust-lang.org/book/ch20-02-multithreaded.html#sending-requests-to-threads-via-channels>`__ of *The Rust Programming Language*.
+-  ``Option`` with ``take()``, as discussed in sections `17.3 <https://doc.rust-lang.org/book/ch17-03-oo-design-patterns.html#requesting-a-review-of-the-post-changes-its-state>`__ and `20.3 <https://doc.rust-lang.org/book/ch20-03-graceful-shutdown-and-cleanup.html#implementing-the-drop-trait-on-threadpool>`__ of *The Rust Programming Language*.
 
-To reduce the number of allocations, try:
+To reduce the number of allocations, try using:
 
--  Using ``mem::take`` or ``mem::replace`` (`Rust Design Patterns <https://rust-unofficial.github.io/patterns/idioms/mem-replace.html>`__).
+-  ``mem::take`` or ``mem::replace`` (`Rust Design Patterns <https://rust-unofficial.github.io/patterns/idioms/mem-replace.html>`__).
 
 .. seealso::