This fixes two regular expressions: One very minor (which wasn't really broken but not sufficiently escaped either) in the tests and another one for the nixAttribute group.
The main fix/feature this introduces is that it brings back strict matching of string escapes, but instead of only highlighting the valid escapes, the invalid ones now are also highlighted with the Error highlighting group.
This fixes two regular expressions: One very minor (which wasn't really broken but not sufficiently escaped either) in the tests and another one for the
nixAttributegroup.The main fix/feature this introduces is that it brings back strict matching of string escapes, but instead of only highlighting the valid escapes, the invalid ones now are also highlighted with the
Errorhighlighting group.