Infra: change <article> to <main> (GH-4996)

Author: hugovk

pep_sphinx_extensions/pep_theme/static/mq.css

@@ -38,7 +38,7 @@
         padding: 0.5rem 1rem 0;
         width: 100%;
     }
-    section#pep-page-section > article,
+    section#pep-page-section > main,
     section#pep-page-section > footer#pep-page-footer {
         max-width: 37em;
         width: 74%;
@@ -65,7 +65,7 @@
   }
 }
 @media (min-width: 60em) {
-    section#pep-page-section > article,
+    section#pep-page-section > main,
     section#pep-page-section > footer#pep-page-footer {
         max-width: 56em;
         padding-left: 3.2%;
@@ -83,7 +83,7 @@
         font-size: 10pt;
         line-height: 1.67;
     }
-    *[role="main"] a[href]:after {
+    main a[href]:after {
         content: " (" attr(href) ")";
         font-size: .75rem;
     }
@@ -163,7 +163,7 @@
         display: none;
     }
 
-    section#pep-page-section > article,
+    section#pep-page-section > main,
     section#pep-page-section > footer#pep-page-footer {
         float: none;
         max-width: 100%;

pep_sphinx_extensions/pep_theme/static/style.css

@@ -288,7 +288,7 @@ table.pep-zero-table tr td:nth-child(5) {
 }
 
 /* Numerical index */
-article:has(> section#numerical-index) {
+main:has(> section#numerical-index) {
     float: unset !important;
     width: 90% !important;
     max-width: 90% !important;

pep_sphinx_extensions/pep_theme/templates/page.html

@@ -53,14 +53,14 @@ <h1 data-pagefind-ignore>Python Enhancement Proposals</h1>
         </div>
         {# Exclude noisy non-PEP pages from Pagefind indexing #}
         {%- if pagename.startswith(("404", "numerical", "pep-0000", "topic")) %}
-        <article>
+        <main>
         {%- else %}
-        <article data-pagefind-body>
+        <main data-pagefind-body>
         {%- endif %}
             {# Add pagefind meta for the title to improve search result display #}
             <span data-pagefind-meta="title:{{ title }}" data-pagefind-weight="10" class="visually-hidden">{{ title }}</span>
             {{ body }}
-        </article>
+        </main>
         {%- if not pagename.startswith(("404", "numerical")) %}
         <nav id="pep-sidebar">
             <pagefind-searchbox shortcut="/" style="font-family: inherit"></pagefind-searchbox>