Update changes re PR #548

To add links to the PR & related issue #520.

Closes #520.

master/changes.html

@@ -277,6 +277,8 @@ <h3 id="types">Basic Data Types and Interfaces chapter</h3>
   <li>Merged in content from the former normative <a href="#svgdom">SVG DOM appendix</a>
     (after edits),
     with sections on reflecting attributes re-arranged to fit.
+    <a href="https://github.com/w3c/svgwg/issues/520">Issue discussion</a>
+    <a href="https://github.com/w3c/svgwg/pull/548">Edits</a>
   </li>
 </ul>
 </div>
@@ -553,7 +555,7 @@ <h3 id="paths">Paths chapter</h3>
   <li>Reorganized the Implementation Notes section into logical subsections
   (including the section on out-of-bounds arc parameters,
   which was formerly in the Implementation Notes appendix).
-    <a href="https://github.com/w3c/svgwg/pull/">Edits</a>
+    <a href="https://github.com/w3c/svgwg/pull/548">Edits</a>
   </li>
 </ul>
 </div>
@@ -895,6 +897,8 @@ <h3 id="interact">Scripting and Interactivity chapter (separate chapters in SVG
 <div class='changed-since-cr1 cr2'>
   <ul>
     <li>Merged in content on events from the removed SVG DOM appendix.
+        <a href="https://github.com/w3c/svgwg/issues/520">Issue discussion</a>
+        <a href="https://github.com/w3c/svgwg/pull/548">Edits</a>
     </li>
   </ul>
 </div>
@@ -1063,6 +1067,10 @@ <h3 id="svgdom">SVG Document Object Model (DOM)(SVG 1.1 Only)</h3>
     except for the section "Relationship with UI Events",
     which is merged into the Interactivity chapter.</li>
   </ul>
+  <p>
+    <a href="https://github.com/w3c/svgwg/issues/520">Issue discussion</a>
+    <a href="https://github.com/w3c/svgwg/pull/548">Edits</a>
+  </p>
 </div>
 
 <h3 id="idl">IDL Definitions appendix</h3>
@@ -1113,7 +1121,7 @@ <h3 id="impreqs">Implementation Notes appendix (was Implementation Requirements
         <li>Printing Implementation Notes is now in Conformance Criteria.</li>
       </ul>
       <a href="https://github.com/w3c/svgwg/issues/520">Issue discussion</a>
-      <a href="https://github.com/w3c/svgwg/pull/">Edits</a>
+      <a href="https://github.com/w3c/svgwg/pull/548">Edits</a>
     </li>
   </ul>
 </div>