When I open a log (e.g., https://treeherder.mozilla.org/logviewer.html#?job_id=5389463&repo=mozilla-inbound), the bottom half of the screen showing the test output is in a variable width font and multiple spaces are compressed into one space. This makes reading the stack trace really difficult. I can click on the raw log, of course, but then I don't get the benefit of clicking on the error lines at the top to jump around. Could we just switch the log output to be inside a <pre> tag or something? It would look much better that way.