Nov 2, 2017 tests (dug9 on win10, latest freewrl, 
others may be old installs last few years)

                                freewrl instant vivaty  octaga   H3D 
t1a_ampersand_quotes.wrl              X       X      X       X     X 
t1b_ampersand_quotes.x3d              *       *      *       X     X 
t2a_single_inside_double.wrl          *       *      *       *     ? 
t2b_single_inside_double.x3d          *       *      *       X     * 
t3a_single_quotes.wrl                 *       *      *       *     ? 
t3b_single_quotes.x3d                 *       *      *       X     * 
t4a_slash_double_quotes.wrl           X       *      X       X     X 
t4b_slash_double_quotes.x3d           *       X      *       X     X 
t5a_slash_single_quotes.wrl           X       X      X       X     X 
t5b_slash_single_quotes.x3d           X       X      X       X     X 

X - error of some kind, no print
* - no error, Browser.print works
? - no error but Browser.print didn't print