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
*         auto-activation of the proposal popup, regardless of whether an
	 *         explicit invocation keyStroke was specified. If this parameter is
	 *         <code>null</code>, then only a specified keyStroke will invoke
	 *         content proposal. If this value is <code>null</code> and the
	 *         keyStroke value is <code>null</code>, then all alphanumeric
	 *         characters will auto-activate content proposal.
	 */
	public char[] getAutoActivationCharacters() {
		if (autoActivateString == null) {
			return null;
		}
		return autoActivateString.toCharArray();
	}
	/**
	 * Set the array of characters that will trigger autoactivation of the
	 * popup.
	 * 
	 * @param autoActivationCharacters
	 *            An array of characters that trigger auto-activation of content
	 *            proposal. If specified, these characters will trigger
	 *            auto-activation of the proposal popup, regardless of whether
	 *            an explicit invocation keyStroke was specified. If this
	 *            parameter is <code>null</code>, then only a specified
	 *            keyStroke will invoke content proposal. If this parameter is
	 *            <code>null</code> and the keyStroke value is
	 *            <code>null</code>, then all alphanumeric characters will
	 *            auto-activate content proposal.
	 * 
	 */
	public void setAutoActivationCharacters(char[] autoActivationCharacters) {