Truncated todo messages display as inline code

@jivanvl confirmed this existed before the gitlab-ce~4123461 migration; I don't remember seeing it prior to %"11.1".
@pedroms confirmed this is unintended from a UX perspective — the ellipsis should be **outside** the code, as _normal_ text.
Discussion begins at https://gitlab.slack.com/archives/C9T1TABMY/p1531252839000155
issue