Bug 65389 '#' should be a default auto activation trigger for javadoc content assist
'#' should be a default auto activation trigger for javadoc content assist, since we offer code assist in situations like /** @see Vector#<caret_here> */. IMO, we should make all these characters auto activation triggers: "@#.<".
org.eclipse.jdt.ui/ui/org/eclipse/jdt/ui/PreferenceConstants.java
/**
	 * A named preference that controls whether an empty line is inserted before
	 * the Javadoc root tag block.
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 *
	 * @since 3.0
	 */	
	public final static String FORMATTER_COMMENT_SEPARATEROOTTAGS= "comment_separate_root_tags"; 
	/**
	 * A named preference that controls whether blank lines are cleared during formatting
	 * <p>
	 * Value is of type <code>Boolean</code>.
	 * </p>
	 *
	 * @since 3.0
	 */	
	public final static String FORMATTER_COMMENT_CLEARBLANKLINES= "comment_clear_blank_lines"; 
	/**
	 * A named preference that controls the line length of comments.
	 * <p>
	 * Value is of type <code>Integer</code>. The value must be at least 4 for reasonable formatting.
	 * </p>
	 *
	 * @since 3.0
	 */	
	public final static String FORMATTER_COMMENT_LINELENGTH= "comment_line_length"; 
	/**
	 * A named preference that controls whether HTML tags are formatted.