Mojo::Transaction::WebSocket::send forces stringification on object

[jberger]

Allows send to stringify an object. This especially helps for Mojo::ByteStream objects returned by render_partial.

[jberger]

The use case (presented by @marcusramberg) is

$app->helper(
  send_partial => sub { 
    my $self = shift; 
    $self->send( $self->render_partial(@_) );
  }
);

which currently fails with the not-so-helpful message

Event "read" failed: Not an ARRAY reference at /Users/marcus/perl5/perlbrew/perls/perl-5.14.1/lib/site_perl/5.14.1/Mojo/Transaction/WebSocket.pm line 209.

In actually you don't want an array reference (a user reading this might surround the call with [] which would attempt to send a raw websocket frame and almost certainly not do what you mean), you want to force stringification

$app->helper(
  send_partial => sub { 
    my $self = shift; 
    $self->send( $self->render_partial(@_) . '' );
  }
);

But with this patch the first example works correctly