Result unclear #204
Description
From the documentation it is completely unclear to me what the result of the slugify function is.
I expected /[a-z0-9_-]/ but my tests failed as there is an undefined number of special characters in the result.
The documentation hints to remove: /[*+~.()'"!:@]/g, and I assume that the result is [a-z0-9_-*+~.()'"!:@] but how would I know?
Please link me the location of this definition and consider to reference it in the README.md