Found issue with example that may point to the cause of the problems I've been having #8

Consider example 2.2.3 from the docs https://fdik.org/pyPEG2/grammar_elements.html#list

Works

import pypeg2 as pp

class Instruction(str): pass

class Block(pp.List):
    grammar = "{", pp.maybe_some(Instruction), "}"

    def __repr__(self):
        return " ".join(self)
        
b = pp.parse(r"{ hello world }", Block)
print(b)

prints "hello world"

Does not work, raises SyntaxError

import pypeg2 as pp

class Instruction(str): pass

class Block(pp.List):
    grammar = "{", pp.maybe_some(Instruction), "}"

    def __repr__(self):
        return " ".join(self)
        
b = pp.parse(r"{ $hello world }", Block)
print(b)

The only difference being the dollar in "$hello world"
It appears all symbol characters are not considered str

Ahh the definition of word is regex \w which disallows any non (0-9|A-Z|a-z) it needs to be more like ([`#$])?([\w.])+

Which would allow tick, hash or dollar to preceed words and class.member to be possible.

This should be mentioned in the online docs.