Bug 51466 TODO marker coloring: Update to new jdt.core behaviour
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaCommentScanner.java
private static class TaskTagDetector implements IWordDetector {
		public boolean isWordStart(char c) {
			return Character.isLetter(c);
		}
		public boolean isWordPart(char c) {
			return Character.isLetter(c);
		}
	}
	private class TaskTagRule extends WordRule {
		private IToken fToken;
		public TaskTagRule(IToken token, IToken defaultToken) {
			super(new TaskTagDetector(), defaultToken);