nits

Author: noamr

fetch.bs

@@ -7052,7 +7052,8 @@ quota to <code>https://frame.example.com</code>, for example by serving the foll
 <p>To <dfn export>reserve deferred-fetch quota</dfn> for a <a>navigable container</a>
 <var>container</var> given an <a for=/>origin</a> <var>originToNavigateTo</var>:
 
-<p class=note>This is called when the container document initiates a navigation. It potentially
+<p class=note>This is called when the container document and the document that initiated the
+navigation (the "source document") <a>share deferred-fetch quota</a>. It potentially
 reserves either 64kb or 8kb of quota for the frame, if it doesn't <a>share deferred-fetch quota</a>
 with its parent and the permissions policy allow. It is not observable to the cotnainer document
 whether the reserved quota was used in practice.