RFR (XS) 8219691: method summary table head should be enclosed in

[Derek Thomson]

Hi all,

I saw this bug and thought I could take a stab at it. Could someone review
my change please?

Webrev: http://cr.openjdk.java.net/~jcbeyler/8219691/webrev.00/
Bug: https://bugs.openjdk.java.net/browse/JDK-8219691

Thanks,
Derek.