Weird parsing of square brackets content

[L3nn0x]

When trying to use square brackets, the parsing inside is weirdly done.

Minimal example : set [test + J + 1], 1

Expected result : compiles and actually precomputes test + 1

Actual result : doesn't compile and I get the error Error: Error { kind: UnknownLabel("J"), state: State { next_error: None, backtrace: None } }.

[Yamakaky]

Yeah, I know, brackets are not well parsed. https://github.com/Yamakaky/dcpu/blob/master/src/assembler/parser/nom_parser.rs#L131-L144