Bug 77598 [nls tooling] NLS hovers / Ctrl+Click not consistent for duplicate keys
20041103 With the following files, the key A.0 is duplicate. - Ctrl + Click: Junps to 'hello' - Hover over "A.0" in class A: shows 'world' public class A { String h= Messages.getString("A.0"); //$NON-NLS-1$ } messages.properties: A.0=hello A.0=world
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
/**
	 * Internal implementation class for a change listener.
	 * @since 3.0
	 */
	protected abstract class AbstractSelectionChangedListener implements ISelectionChangedListener  {
		/**
		 * Installs this selection changed listener with the given selection provider. If
		 * the selection provider is a post selection provider, post selection changed
		 * events are the preferred choice, otherwise normal selection changed events
		 * are requested.
		 * 
		 * @param selectionProvider
		 */
		public void install(ISelectionProvider selectionProvider) {
			if (selectionProvider == null)
				return;