Whitespaces

Whitespace is any non-empty string containing only characters that have the below Unicode properties:

U+0009 (horizontal tab, '\t')
U+000B (vertical tab)
U+000C (form feed)
U+0020 (space, ' ')
U+0085 (next line)
U+200E (left-to-right mark)
U+200F (right-to-left mark)
U+2028 (line separator)
U+2029 (paragraph separator)

New lines

New line are used as end-of-line separators:

U+000A (line feed, '\n')
U+000D (carriage return, '\r')