Fix typos

CHANGES

@@ -73,7 +73,7 @@ Bugs fixed
 * #9838: autodoc: AttributeError is raised on building document for functions
   decorated by functools.lru_cache
 * #9879: autodoc: AttributeError is raised on building document for an object
-  having invalid __doc__ atribute
+  having invalid __doc__ attribute
 * #9844: autodoc: Failed to process a function wrapped with functools.partial if
   :confval:`autodoc_preserve_defaults` enabled
 * #9872: html: Class namespace collision between autodoc signatures and
@@ -158,7 +158,7 @@ Bugs fixed
 * #9752: autodoc: Failed to detect type annotation for slots attribute
 * #9756: autodoc: Crashed if classmethod does not have __func__ attribute
 * #9757: autodoc: :confval:`autodoc_inherit_docstrings` does not effect to
-  overriden classmethods
+  overridden classmethods
 * #9781: autodoc: :confval:`autodoc_preserve_defaults` does not support
   hexadecimal numeric
 * #9630: autosummary: Failed to build summary table if :confval:`primary_domain`

EXAMPLES

@@ -430,7 +430,7 @@ Books produced using Sphinx
 * `"Theoretical Physics Reference" <https://www.theoretical-physics.net/>`__
 * `"The Varnish Book" <https://info.varnish-software.com/the-varnish-book>`__
 
-Theses produced using Sphinx
+These produced using Sphinx
 ----------------------------
 
 * `"A Web-Based System for Comparative Analysis of OpenStreetMap Data by the Use

tests/test_extension.py

@@ -2,7 +2,7 @@
     test_extension
     ~~~~~~~~~~~~~~
 
-    Test sphinx.extesion module.
+    Test sphinx.extension module.
 
     :copyright: Copyright 2007-2021 by the Sphinx team, see AUTHORS.
     :license: BSD, see LICENSE for details.