Enable linebreak rendering in WYSIWYM mode [was #7552]
In TEI, elements (or something like milestone type="lb") are used to indicate a line break. However, it seems it isn't possible to render line breaks in the WYSIWYM mode.
The CSS 2.1 specification suggests the following for HTML's br element: {code:html}
br:before {
content: "\A";
} {code}
but this doesn't seem to have any effect in Vex.