prefs: [layout.css.contain.enabled:true, layout.css.initial-letter.enabled:true, layout.css.overflow-clip-box.enabled:true, layout.css.shape-outside.enabled:true]
[addition-per-property.html]
  type: testharness
  [column-gap: "normal" onto "200px"]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1356241

