Format Probleme label input

[Rolf B]

Hallo Gunnar,

ich versuche das besser gar nicht erst und überlasse das den Experten bei MDN:

Note: The + and - operators must be surrounded by whitespace. For instance, calc(50% -8px) will be parsed as a percentage followed by a negative length − an invalid expression − while calc(50% - 8px) is a percentage followed by a subtraction operator and a length. Likewise, calc(8px + -50%) is treated as a length followed by an addition operator and a negative percentage.

The * and / operators do not require whitespace, but adding it for consistency is both allowed and recommended.

Rolf