New build log hides leading whitespace
See https://dev.gitlab.org/gitlab/gitlabhq/-/jobs/1176837 for an example.
In the DOM, we see the leading whitespace:
But this is not visible in the rendered output:
All lines except the first should be indented there.
This is a regression because the build logs in 9.2 don't do that, and the leading whitespace helps people read the job output.