Bug 20644 [hovering] Javadoc hover cannot handle link tag
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/javadoc/JavaDoc2HTMLTextReader.java
static private class Pair {
		String fTag;
		String fContent;
		
		Pair(String tag, String content) {
			fTag= tag;
			fContent= content;