* \li Params: <NAME>: normal, protected, visible, thin, quad, qquad, enspace,
enskip, negthinspace, negmedspace, negthickspace, hfill,
hfill*, dotfill, hrulefill, hspace, hspace* \n
+ Only in math mode: med and thick.\n
<LEN>: length for custom spaces (hspace, hspace* for protected)
* \li Origin: JSpitzm, 20 May 2003, Mar 17 2008
* \endvar