By default, exceptions now eliminate most of the Moose internals from stack traces

I also did some cleanup on the Moose::Manual::Exceptions doc.
On Thu, Oct 23, 2014 at 03:39:26AM -0700, Dagfinn Ilmari Mannsåker wrote:
> > +        if ($in_moose & $frame->package =~ /^(?:Moose|Class::MOP)(?::|$)/) {
> 
> Shouldn't that be &&?

Indeed it should!  Although I think it would come out correct anyway
in this case because both the LHS and RHS can only ever be 0x1 or 0x0... :)