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$ perl -e 'my $x = " X "; $x =~ s/^\s+|\s+$//; print "|$x|";'
|X |

$ perl -e 'my $x = " X "; $x =~ s/^\s+|\s+$//g; print "|$x|";'
|X|

#!/usr/bin/env perl

...
        ],
    };
}

User Test Index 0:
{
...
Results:
{ "Lang A" => [2, 3], "Lang Q" => [2, 3], "ref_lang" => [2, 3] }
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