* Turn on revive linter, ignore only a few things
* Fix lint errors
Ignore shadowing of 'suite' in tests for now. Also move some constants
that had the same value to tester.
* Function and tests for returned unescaped elements
* Regression test and fix for empty segment bug
If a raw segment had no elements that had length > 0 or just didn't have
any elements it would still create a segment, throwing everything else
off. Explicitly test for that now.
