Links to wiki pages containing '|-|' in their name are broken when saved by the WYSIWYG editor

Put the following in a wiki page:

[[label>>one|-|two]]

image:one|-|two.png

Edit in WYSIWYG mode and save without changing anything. You get:

[[Label>>one]]

image:one

The problem seems to be that XHTMLMarkerResourceReferenceSerializer doesn't escape the '|-|' sequence in the entity reference. You get:

<!--startwikilink:false|-|doc|-|one|-|two-->
<!--startimage:false|-|attach|-|one|-|two.png-->

Since '|-|' is not escaped I suppose "two" is considered a resource reference parameter. Would we break backwards compatibility if we start encoding the '|-|' now?