Possibly unicode category is missing for `[Uu]` code in the documentation

[aleksmelnikov]

I 've found [Uu] code in the csharp.gram:

// A.1.8 Literals
		INTEGER_LITERAL_DECIMAL		-> ('0' | [1-9] [0-9]*) ([Uu] [Ll]? | [Ll] [Uu]? )? ;

Please, could you add a unicode category for it in the docs?

[woutersl]

[Uu] here is not a unicode category, it is a character class. In this case, it describes a class where characters can be either U or u. Here it is equivalent to ('U' | 'u').

[aleksmelnikov]

thx