Bug 42587 Left over from content assist
M3 - set preference that content assist should overwrite - open content assist on some word so that the rest of the word is indicated to be overwritten - transfer focus to the content assist widget using TAB - Esc -> overwrite indication is still there
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/link/contentassist/CompletionProposalPopup2.java
p.apply(document);
			}
			
			Point selection= p.getSelection(document);
			if (selection != null) {
				fViewer.setSelectedRange(selection.x, selection.y);
				fViewer.revealRange(selection.x, selection.y);
			}
			
			IContextInformation info= p.getContextInformation();
			if (info != null) {				
				
				int position;
				if (p instanceof ICompletionProposalExtension) {
					ICompletionProposalExtension e= (ICompletionProposalExtension) p;
					position= e.getContextInformationPosition();
				} else {
					if (selection == null)
						selection= fViewer.getSelectedRange();
					position= selection.x + selection.y;
				}
				
				fContentAssistant.showContextInformation(info, position);
			}
			
			fContentAssistant.setProposalChosen(true);
		
		} finally {
			if (target != null)
				target.endCompoundChange();