Closes #641

Closes #643

Closes #642

All supported browsers have this method.

test="<a href=# onclick=\"alert(); return false;\">test</a>";

Previous (incorrect) behavior was:
test="<a href=# onclick=\"alert();
   return false;
\">test</a>"

Issue #627

Move to a slight variation of the old code again, since the new one
had some serious problems.

Spaces at the end of the line cause different wrapping in that
engine.

Implicit conversion to bool was used where ==null was intended.

Closes #624

Issue #626