Document tree macro ignores excluded references when showSpaces is "true"

With showSpaces="true", you cannot hide page/space through exclusions . To obsever current behaviour, either create new space/page or use existen ones and call documentTree macro somewhere in your XWiki, ex.

{{documentTree showSpaces="true" showRoot="true" exclusions="document:xwiki:Sandbox.Internal Test.WebHome"/}}

or

{{documentTree showSpaces="true" showRoot="true" exclusions="space:xwiki:Sandbox.Internal Test"/}}

Both source codes will provide this result local test from XWiki Jetty HSQLDB 17.10.9.jpeg . Only passing showSpaces="false" will exclude listed page/space.