### What happened? A single opening `[` may appear unescaped in charsets and thus should not be scoped `punctuation.definition.set`. ```regex [[] ``` It becomes punctuation not before valid nestedcharset is present. ```regex [[:alpha:]] or [[A-Z]-[0-9]] ```
What happened?
A single opening
[may appear unescaped in charsets and thus should not be scopedpunctuation.definition.set.It becomes punctuation not before valid nestedcharset is present.