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USING: arrays continuations debugger io.streams.string peg tools.test ;
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{ "Peg parsing error at character position 0.\nExpected 'A' or 'B'\nGot 'xxxx'\n" } [
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[ "xxxx" "A" token "B" token 2array choice parse ] [ ] recover
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[ error. ] with-string-writer
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] unit-test
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