IMHO break is needless and should be abandoned in favor of last. (which linguistically still makes sense)
But break doesn't act as last. It acts as next. But using next in a given/when to end the given would be odd - I'd expect next to act as continue does now.

In reply to Re^5: "when" and replacements by JavaFan
in thread "when" and replacements by John M. Dlugosz

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