in assets/js/lib-markdown.js [1624:1637]
var _split_on_unescaped = function( s, ch ) {
ch = ch || '\\s';
if ( ch.match(/^[\\|\[\]{}?*.+^$]$/) )
ch = '\\' + ch;
var res = [ ],
r = new RegExp('^((?:\\\\.|[^\\\\' + ch + '])*)' + ch + '(.*)'),
m;
while ( ( m = s.match( r ) ) ) {
res.push( m[1] );
s = m[2];
}
res.push(s);
return res;
};