Closes #646

Closes #553

And fix a bug that they exposed

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.