normal: collapse space & new line; wrap
(tab) This is normal (break line)
white space (white space at end)
nowrap: collapse space & new line; no wrap
(tab) This is nowrap (break line)
white space (white space at end)
pre: preserve space & new line; no wrap
(tab) This is pre (break line)
white space (white space at end)
pre-wrap: preserve space & new line; wrap
(tab) This is pre-wrap (break line)
white space (white space at end)
pre-line: collapse space but preserve new line; wrap
(tab) This is pre-line (break line)
white space (white space at end)
break-spaces: preserve space new line; wrap;
(tab) This is break-spaces (break line)
white space (white space at end)