Please review - 6984084 - String repeat()

[Jim Gish]

Please review http://cr.openjdk.java.net/~jgish/6984084-StringRepeat/

This in response to an old RFE to add either a new constructor or a 
method to repeat a string, such as "*".repeat(5) resutling in "*****"

There is nothing particularly lambda related in here other then the fact 
that under the covers I'm using StringJoiner.

I'm happy with the name "repeat" but question the "addNcopies" method in 
AbstractStringBuilder -- suggestions welcome.

Thanks,
    Jim

-- Jim Gish | Consulting Member of Technical Staff | +1.781.442.0304 
Oracle Java Platform Group | Core Libraries Team 35 Network Drive 
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