BNF.md says unicode scalars are supported, but they aren't

[KyLeggiero]

I understand if BNF.md is supposed to be a general reference, rather than a reference of the syntax of this specific parser, but then it shouldn't be implied that it's this parser's grammar in the readme:

Covfefe/README.md

Line 64 in 8c69c03

Grammars can be specified in a superset of EBNF or a superset of BNF, which adopts some features of EBNF (documented [here](/BNF.md)).

so I assumed that this documents the version of (E)BNF this parser uses.

I see in BNF.md that Unicode scalars are supported:

Covfefe/BNF.md

Lines 182 to 184 in 8c69c03

	unicode-scalar = "\\", "u", "{", unicode-scalar-digits, "}";
	unicode-scalar-digits = [digit], [digit], [digit], [digit], [digit], [digit], [digit], digit;
	digit = '0' ... '9' | 'A' ... 'F' | 'a' ... 'f';

so I tried to implement an "any non-control character goes" rule like this:

comment_char = \u{000020} ... \u{1FFFFF} ;

but I get this error message:

Error: Unmatched pattern at L1:16: '\', expected: digit | delimiting-rule-name-char | whitespace | literal | expression-optional | comment | expression-repetition | single-char-literal | delimiting-rule-name-char | expression-group

[KyLeggiero]

Nevermind, misunderstood that these must be in a string. Whoops!