> Test suite from stdin
> [(stdin):1] Test sorting and filtering of output
> [(stdin):3] true
+>
> [(stdin):6] true
+>
> [(stdin):8] printf 'profiling: foo\n'
+>
> [(stdin):10] printf 'profiling: foo'
+>
> [(stdin):13] printf 'profiling: foo\n'
+>
> [(stdin):16] printf 'profiling: foo'
+>
> [(stdin):18] printf 'a\nb\nc\nd\n'
+>
> [(stdin):24] printf 'a\nb\nc\nd'
+>
> [(stdin):31] printf 'c\nd\nb\na\n'
+>
> [(stdin):38] printf 'c\nd\nb\na'
+>
> [(stdin):44] printf 'a\nprofiling: foo\nprofiling: bar\nb\nc\nd\nprofiling: baz\n'
+>
> [(stdin):50] printf 'a\nprofiling: foo\nprofiling: bar\nb\nc\nd\nprofiling: baz'
+>
> [(stdin):57] printf 'c\nprofiling: foo\nprofiling: bar\nd\nb\na\nprofiling: baz\n'
+>
> [(stdin):64] printf 'c\nprofiling: foo\nprofiling: bar\nd\nb\na\nprofiling: baz'
+>
> Test suite from stdin OK
p Check the Right Prefix Length (19) for "output sort"