my $msg_body_2 = <<"EOT";

line 5
line 6
line7a\tline7b
line8 

EOT

##</code><code>##

my $msg_body_2 = 
    "\n\n" .
    "line 5\n" .
    "line 6\n" .
    "line 7a\tline7b\n" .
    "line 8\n" .
    "\n\n";