We have a problem: if files aren't loaded/required we don't have branch data. If they are added through track_files we give it 0/0 branches which we show as 100% coverage (all possible branches are covered).

That math is "wrong" though here because there are branches but we don't know what they are. We should probably count total branches here as "unkown" and establish that in our "math unive

undercover should create warnings on entire files that weren't required by specs and hence don't show up in the lcov output.

This can be done by changing logic starting from Undercover::Report#load_and_parse_file

Reference

ryanluker/vscode-coverage-gutters#239 (comment)

Problem

The old names for the coverage elements (highlights) is quite confusing now that we have gutter coverage elements as well as line and map based ones. We can use the example naming by @DevilXD as a starting point for switching to something more sensical.

Work

1. Slightly adj