Here is a way that I used to solve your problem (be careful about the number of newlines and alike. It is a very fragile approach)

#!/usr/bin/perl -w
use strict;
my $a = join '', <DATA>;
$a =~ s/\n{2}(\d.\d+)/ $1/g;
$a =~ s/\n{2}/\n/g;
print $a;

__DATA__

Alan

2.13

Mary

2.16
[download]

This prints:

Alan 2.13
Mary 2.16
[download]

I hope this is of any use.