i18n:msg directive not working when used as an element

[cboos]

At least in one situation, a correctly extracted message from an <i18n:msg> tag didn't get translated during filtering (as reported in #9308).

The workaround was to use the i18n:msg directive as an attribute instead of a tag:

tracopt/ticket/templates/ticket_delete.html

@@ -17 +17 @@
     <div id="content" class="ticket" py:choose="action">
       <py:when test="'delete'">
         <h1 id="trac-ticket-title">
-          <i18n:msg params="id">Delete <a href="${href.ticket(ticket.id)}">Ticket #$ticket.id</a></i18n:msg>
+          <span i18n:msg="id">Delete <a href="${href.ticket(ticket.id)}">Ticket #$ticket.id</a></span>
           <span class="status">($ticket.status<py:if
               test="ticket.type"> $ticket.type</py:if><py:if
               test="ticket.resolution">: $ticket.resolution</py:if>)</span>

Surprising, no?

[cboos]

FYI, ​#T9307 was similar (and #9308 in the description is actually ​#T9308, of course).

[hodgestar]

Moved to milestone 0.9.