|  | USING: grouping tools.test kernel sequences arrays ;
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							|  | IN: grouping.tests
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							|  | 
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							|  | [ { 1 2 3 } 0 group ] must-fail
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							|  | 
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							|  | [ { "hell" "o wo" "rld" } ] [ "hello world" 4 group ] unit-test
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							|  | 
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							|  | [ { V{ "a" "b" } V{ f f } } ] [
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							|  |     V{ "a" "b" } clone 2 <groups>
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							|  |     2 over set-length
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							|  |     >array
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							|  | ] unit-test
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