ADDITIONAL SYSTEM INFORMATION :
Java 11 SE API docs for ServiceLoader

A DESCRIPTION OF THE PROBLEM :
Docs currently say:

 As an example, suppose a module specifies the following directives:


     provides com.example.CodecFactory with com.example.impl.StandardCodecs;
     provides com.example.CodecFactory with com.example.impl.ExtendedCodecsFactory;
 
Whereas spec says multiple service providers for a particular service, need to be comma-separated. The above would produce error on compilation, because there are two separate 'provides' statements for the same service.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/ServiceLoader.html

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
 As an example, suppose a module specifies the following directive:


     provides com.example.CodecFactory with com.example.impl.StandardCodecs, com.example.impl.ExtendedCodecsFactory;
 
ACTUAL -
 As an example, suppose a module specifies the following directives:


     provides com.example.CodecFactory with com.example.impl.StandardCodecs;
     provides com.example.CodecFactory with com.example.impl.ExtendedCodecsFactory;
 

FREQUENCY : always