Bug 43207 Javadoc info for content assist only shown once
I20030916 Javadoc infos for content assist are only shown the first time an editor is opened. Afterwards, no javadoc is shown any more. - open a java source file (e.g. public class A { }) - Press Ctrl+Space to invoke content assist => works: selection in proposal list shows javadoc hover (if javadoc available) - Press Esc, press Ctrl+Space again => fails: selection in proposal list does not make any javadocs appear
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/link/contentassist/CompletionProposalPopup2.java
* @param offset the offset
	 * @param event the merged document event
	 * @return the set of filtered proposals
	 * @since 2.0
	 */
	private ICompletionProposal[] computeFilteredProposals(int offset, DocumentEvent event) {
		
		if (offset == fInvocationOffset && event == null)
			return fComputedProposals;
			
		if (offset < fInvocationOffset) {
			return null;
		}
		
		ICompletionProposal[] proposals= fComputedProposals;
		if (offset > fFilterOffset)
			proposals= fFilteredProposals;
			
		if (proposals == null)
			return null;
			
		IDocument document= fViewer.getDocument();
		int length= proposals.length;
		List filtered= new ArrayList(length);
		for (int i= 0; i < length; i++) {
				
			if (proposals[i] instanceof ICompletionProposalExtension2) {
				ICompletionProposalExtension2 p= (ICompletionProposalExtension2) proposals[i];				
				if (p.validate(document, offset, event))
					filtered.add(p);