autodoc: Preserve whitespace in inline code spans

Fixes #20754

Author: squeek502

lib/docs/index.html

@@ -26,6 +26,9 @@
         margin: 0;
         overflow-x: auto;
       }
+      :not(pre) > code {
+        white-space: break-spaces;
+      }
       code {
         font-family:"Source Code Pro",monospace;
         font-size: 0.9em;