Since you only sketch the actual output code, perhaps the problem is there?

On the other hand, if your "print @tmpHeader" is your actual code, you might find

for my $tmpHeader(@tmpHeader) {
    print '[' . $tmpHeader . '] ';
}
[download]

more readable, when you've solved the root issue.

Update: "more readable" may be irrelevant; depends on the how -- precisely -- the data you show is formatted. ikegami's use of __DATA__ produces entirely readable output, but my initial instinct was to hardcode what you presented as:

my @allData = ('Test 1 of 1',
'bala',
'bala',
...
[download]

which produces the (desired) output as a single line without distinction among the elements.

Obligatory suggestion: use strict; use warnings; may be helpful, especially if there's a slip betwixt cup and lip typo between your actual code and what you posted.