Problem with coloring

[dtoffe]

Installed product versions

• Visual Studio Code: 1.89.0
• This extension: 1.3.1

Description

The coloring is affected by a special '¬' character. Deleting the optional part with that character solves the problem and the coloring works fine again.

Steps to recreate

1. Copy this snippet into an ebnf file:

special-symbol = '+' | '-' | '*' | '/' | '¬' | '=' | '<' | '>' | '[' | ']' | '.' | ',' | ':' |
                 ';' | '^' | '(' | ')' | '<>' | '<=' | '>=' | ':=' | '..' | 
                 'and' | 'array' | 'begin' | 'case' | 'const' | 'div' | 'do' | 'downto' | 'else' |
              'end' | 'file' | 'for' | 'function' | 'goto' | 'if' | 'in' | 'label' | 'mod' |
              'nil' | 'not' | 'of' | 'or' | 'packed' | 'procedure' | 'program' | 'record' |
              'repeat' | 'set' | 'then' | 'to' | 'type' | 'until' | 'var' | 'while' | 'with' ;

Current behavior

The coloring is incorrect when using the character '¬' in an ebnf option specification.

Expected behavior

The coloring should be correct for a rule containing that character.