Modified XMLEventReader to write dummy <ignore/...
Modified XMLEventReader to write dummy <ignore/...

Modified XMLEventReader to write dummy <ignore/> tag only once.
Contributed by Jean-Laurent Huynh, reviewed by extempore. Closes #3840.


martijnhoekstra/scala,shimib/scala,jvican/scala,slothspot/scala,jvican/scala,shimib/scala,lrytz/scala,martijnhoekstra/scala,scala/scala,jvican/scala,martijnhoekstra/scala,felixmulder/scala,lrytz/scala,martijnhoekstra/scala,felixmulder/scala,felixmulder/scala,jvican/scala,martijnhoekstra/scala,slothspot/scala,lrytz/scala,slothspot/scala,scala/scala,shimib/scala,felixmulder/scala,jvican/scala,lrytz/scala,scala/scala,scala/scala,scala/scala,slothspot/scala,shimib/scala,slothspot/scala,jvican/scala,felixmulder/scala,shimib/scala,felixmulder/scala,scala/scala,slothspot/scala,jvican/scala,slothspot/scala,lrytz/scala,lrytz/scala,martijnhoekstra/scala,felixmulder/scala,shimib/scala