Bug 139063 [Field Assist] - API - behavior of text insert not taking selection into account
Field Assist Example - set acceptance style to "Insert into field content" - type some text into the text and combo - select a subset of the text and invoke content assist - choose a proposal in the popup outcome: text is inserted at the insertion point expected: text should be inserted, but should replace any selected text Is this a regression?
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
*            the IContentProposalListener2 to be added as a listener. Must
	 *            not be <code>null</code>. If an attempt is made to register
	 *            an instance which is already registered with this instance,
	 *            this method has no effect.
	 * 
	 * @since 3.3
	 * @see org.eclipse.jface.fieldassist.IContentProposalListener2
	 */
	public void addContentProposalListener(IContentProposalListener2 listener) {
		proposalListeners2.add(listener);
	}
	/**
	 * Remove the specified listener from the list of content proposal listeners
	 * that are notified when a content proposal popup is opened or closed.
	 * </p>
	 * 
	 * @param listener
	 *            the IContentProposalListener2 to be removed as a listener.
	 *            Must not be <code>null</code>. If the listener has not
	 *            already been registered, this method has no effect.
	 * 
	 * @since 3.3
	 * @see org.eclipse.jface.fieldassist.IContentProposalListener2
	 */
	public void removeContentProposalListener(IContentProposalListener2 listener) {
		proposalListeners2.remove(listener);
	}
	/*
	 * Add our listener to the control. Debug information to be left in until
	 * this support is stable on all platforms.