Julian Prein
372865f9c4
Apparently the `\zs` token does not match characters if they are already part of a syntax match. For example in `[^0][^1]` only the zero footnote is matched. Fix this by using a positive lookbehind that does not have this limitation. Additionally, use a negative lookahead for the colon to make the pattern slightly more readable, since it does not need the end-of-line check.