Do you think it's possible to use another log function, like "coverageLog" ? This log function would send the log message using another command like:
```javascript
MochaReporter.send(
   JSON.stringify(['lcoverage log', logDetails])
);
```

Then on the server side we could filter.

But if you think it's a lot of work maybe it's possible to do only part of it in this bug. How about adding this `coverageLog` function, but make it call `console.log` ? Then in a follow-up bug you could do the coverageLog + filtering implementation.

What do you think?