d some have been renamed, to be more in line with other modules like\\n`Array` and `Dict`.\\n\\n## Misc. changes\\n\\n* All functions named `filter` have been renamed to `keepIf`. Similarly, `filterMap` has been\\nrenamed to `mapAndKeepJust` and `flatMap` to `mapAndFlatten`.\\n* Functions named `length` are expected to return in constant time. Where this isn't the case, the function\\nhas been renamed to `count`.\\n* `Node.endWithCmd` has been replaced with `Node.endSimpleProgram`.\\n* The time-travelling d