Unicode.Property.pattern_white_space-question-mark
You're seeing just the function
pattern_white_space-question-mark, go back to Unicode.Property module for more information.
Returns a boolean indicating if the
codepoint or string has the property
:pattern_white_space.
For string parameters, all codepoints in
the string must have the :pattern_white_space
property in order for the result to be true.