Use optimal quantifiers for concatenated quantified characters.
configuration in plugin:clean-regex/recommended: "warn"
If two quantified characters, character classes, or characters are concatenated, the quantifiers can be optimized if either of the characters elements is a subset of the other.
Let's take \d+\w+ as an example. This can be optimized to the equivalent
pattern \d\w+. Not only is the optimized pattern simpler, it is also faster
because the first pattern might take up to O(n^2) steps to fail while the
optimized pattern will fail after at most O(n) steps. Generally, the optimized
pattern will take less backtracking steps to fail.
Choosing optimal quantifiers does not only make your patterns simpler but also faster and most robust against ReDos attacks.
With this option you can control whether reported issue will be auto-fixable. You might want to turn the fixability off because the optimally-quantified pattern does not express your intend.