$source_heart_beat_timestamp = "20171207_113255";
$target_heart_beat_timestamp = "bar";

$output_msg = "Source Heart Beat TimeStamp: " . $source_heart_beat_timestamp . "\n";
$output_msg .= "Target Heart Beat TimeStamp: $target_heart_beat_timestamp";

##</code><code>##

local_do_mail:
Source Heart Beat TimeStamp: 20171207_113255
Target Heart Beat TimeStamp: bar

##</code><code>##

local_do_mail:
Source Heart Beat TimeStamp: 20171207_113255 Target Heart Beat TimeStamp: bar

##</code><code>##

local_do_mail:
Source Heart Beat TimeStamp: foo
Target Heart Beat TimeStamp: bar

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;

use v5.16;

use MIME::Lite;

my $source_heart_beat_timestamp = '';
my $target_heart_beat_timestamp = '';

sub local_do_mail {
   my ($msg_body) = @_;

   my $msg = MIME::Lite->new(
      From    => 'cloudops@foo.com',
      To      => 'cbeckley@foo.com',
      Subject => 'testing missing eol',
      Data    => $msg_body
   );

   $msg->send;
}

#
# The mail output here includes the \n after the source_heartbeat
#
$source_heart_beat_timestamp = "foo";
$target_heart_beat_timestamp = "bar";

my $output_msg = "Source Heart Beat TimeStamp: " . $source_heart_beat_timestamp . "\n";
$output_msg .= "Target Heart Beat TimeStamp: $target_heart_beat_timestamp";

say "local_do_mail:\n$output_msg";
local_do_mail("local_do_mail:\n$output_msg");

#
# The mail output here does not include the \n after the source_heartbeat
#
$source_heart_beat_timestamp = "20171207_113255";
$target_heart_beat_timestamp = "bar";

$output_msg = "Source Heart Beat TimeStamp: " . $source_heart_beat_timestamp . "\n";
$output_msg .= "Target Heart Beat TimeStamp: $target_heart_beat_timestamp";

say "local_do_mail:\n$output_msg";
local_do_mail("local_do_mail:\n$output_msg");

##</code><code>##

local_do_mail:
Source Heart Beat TimeStamp: foo
Target Heart Beat TimeStamp: bar
local_do_mail:
Source Heart Beat TimeStamp: 20171207_113255
Target Heart Beat TimeStamp: bar

##</code><code>##

local_do_mail:
Source Heart Beat TimeStamp: foo
Target Heart Beat TimeStamp: bar

##</code><code>##

local_do_mail:
Source Heart Beat TimeStamp: 20171207_113255 Target Heart Beat TimeStamp: bar