Unicode.Property.alphanumeric-question-mark
You're seeing just the function
alphanumeric-question-mark, go back to Unicode.Property module for more information.
Returns a boolean based upon whether the given codepoint or binary is all alphanumeric characters.
Example
iex> Unicode.Property.alphanumeric? "123abc"
true
iex> Unicode.Property.alphanumeric? "⅔"
false