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1) create an empty xhtml jsf page 2) delete the whole content 3) type <h:bo| and invoke cc 4) select <h:body> and complete it => "<h:bod xmlns:h="http://java.sun.com/jsf/html"y" is inserted
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss