RFR: JDK-8222241 - Example in ServiceLoader API docs should have one provides directive

[Fernando Guallini]

Hi, 
in the ServiceLoader API docs, the given example specifying the service providers for a particular service should be comma-separated instead of using two separate ‘provides’ directives, that would result in a compilation error.

Web rev: http://cr.openjdk.java.net/~pconcannon/fguallin/8222241/webrevs/webrev.00/ <http://cr.openjdk.java.net/~pconcannon/fguallin/8222241/webrevs/webrev.00/> 

Bug: https://bugs.openjdk.java.net/browse/JDK-8222241 <https://bugs.openjdk.java.net/browse/JDK-8222241>

Thanks,
Fernando