Bug 20644 [hovering] Javadoc hover cannot handle link tag
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/javadoc/JavaDoc2HTMLTextReader.java
int c= '@';
		while (c != -1) {
		
			buffer.setLength(0);
			buffer.append((char) c);
			c= getTag(buffer);
			String tag= buffer.toString();			
			
			buffer.setLength(0);
			if (c != -1) {
				buffer.append((char) c);
				c= getContentUntilNextTag(buffer);
			}
			
			handleTag(tag, buffer.toString());
		}
		
		return printSimpleTag();
	}
	
	private String printBlockTag(String tag, String tagContent) {
		
		if ("@link".equals(tag) || "@linkplain".equals(tag)) { 
			
			StringTokenizer tokenizer= new StringTokenizer(tagContent);
			int count= tokenizer.countTokens();
			
			if (count == 1)
				return subsituteQualification(tokenizer.nextToken());