Content assist does not support multiple namespaces with the same uri

EXECUTE: Create in xhtml file two namespaces
xmlns:h1="http://java.sun.com/jsf/html"
xmlns:h2="http://java.sun.com/jsf/html"
ASSERT: Proposals for input '<|' will contain both <h1:... and <h2:...
FAILURE: List contains proposals for only one prefix.