Do you mean you want to eliminate spaces and new lines?

use Data::Dumper;

my @test=("aaa
                  bbbbb
                               cccc");

my @test = map { s/\s//g; $_ } @test;
print Dumper(\@test);
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And the output is as expected:

$VAR1 = [
          'aaabbbbbcccc'
        ];
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