add format to Min Constraint and some minor unification of dots and quotes

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | #2042 (partially)

Following @WouterJ initiative at #2042 I think this is the only constraint that was missing formats. Also, small unification in terms of quotes and dots at the end.