Try using  <code> </code> blocks to show your file contents.

As to the question, i would try using regular expressions in multiline mode and replacing the newline if it's followed by whitespace with a single space character.

Update:

This should work:

#!/usr/bin/perl -w
use strict;

$/ = undef;
my $filecontents = <>;

$filecontents =~ s/\n\s+//gm;
print $filecontents;
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Regards, Luke