[3.13] gh-57491: Reduce the EPUB table of contents depth to 2 (GH-158105) (#158251)

Co-authored-by: Danishk2445 <143554875+Danishk2445@users.noreply.github.com>

Author: miss-islington

Doc/conf.py

@@ -462,6 +462,10 @@
 # https://github.com/sphinx-doc/sphinx/issues/12359
 epub_use_index = False
 
+# The default depth of 3 lists over a thousand entries, which makes the
+# table of contents hard to navigate in e-book readers
+epub_tocdepth = 2
+
 # translation tag
 # ---------------
 

Misc/NEWS.d/next/Documentation/2026-09-24-10-10-15.gh-issue-57491.UA-2uN.rst

@@ -0,0 +1,3 @@
+Reduce the depth of the table of contents in the EPUB documentation from
+three levels to two, making it much shorter and easier to navigate in e-book
+readers.