Bug 40787 [plan item] Affordance for F2 opportunity in Java editor
There should be a small label explaining that F2 pins the hover.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/hover/JavaSourceHover.java
*/
	protected String getHoverInfo(IJavaElement[] result) {
		int nResults= result.length;
		
		if (nResults > 1)
			return null;			
			
		IJavaElement curr= result[0];
		if (curr instanceof IMember && curr instanceof ISourceReference) {
			try {
				String source= ((ISourceReference) curr).getSource();
				if (source == null)
					return null;
					
				source= removeLeadingComments(source);
				String delim= null;
				try {
					delim= StubUtility.getLineDelimiterUsed(result[0]);
				} catch (JavaModelException e) {
					delim= System.getProperty("line.separator", "\n"); 
				}
				String[] sourceLines= Strings.convertIntoLines(source);
				String firstLine= sourceLines[0];
				if (!Character.isWhitespace(firstLine.charAt(0)))
					sourceLines[0]= ""; 
				CodeFormatterUtil.removeIndentation(sourceLines);
				if (!Character.isWhitespace(firstLine.charAt(0)))
					sourceLines[0]= firstLine;
				source= source= Strings.concatenate(sourceLines, delim);