Steps to reproduce:
- Go to https://de.wikipedia.beta.wmflabs.org/wiki/1._M%C3%BCnchner_SC?veaction=editsource
- If that's not already the case, make your window small enough that the notice "Nicht markiert" in the top right corner overlaps the text to edit.
Expected result: Actually, the notice should not overlap at all, but at least it shouldn't mess up position of syntaxhighlighting.
Note that the syntaxhightlight and the actual text now differ, as visible in the red underline for "SC", which is one line to low.