Tapestry 4 and earlier had the "$content$" marker that would limit the content in the template. A new T5 element, <t:content>, would accomplish much the same thing. It would allow the outermost portion of a page template to be "placeholder" (for WYSIWYG), with the central part of the template marked as the <t:content>.
<t:content> would not be allowed to nest.
The Tapestry 4 $remove$ marker has already been fixed as
|Field||Original Value||New Value|
|Assignee||Howard M. Lewis Ship [ hlship ]|
|Status||Open [ 1 ]||In Progress [ 3 ]|
|Status||In Progress [ 3 ]||Closed [ 6 ]|
|Fix Version/s||220.127.116.11 [ 12313660 ]|
|Resolution||Fixed [ 1 ]|