Hjson from which whitespace and comments should be consumed.
How many dchars were popped from the front of hjson since last line feed. Will be updated by the function. Needed to properly parse multiline strings.
true if a line feed was skipped, false otherwise. This is needed because line feeds can be used to separate aggregate members similar to commas.
HjsonException if a block comment is not terminated before the end of the string.
Consumes all whitespace and comments from the front of the passed Hjson.