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use strict;
use warnings;
...
my %var_h =(1 => "  value", "2" => "two  ");
s/(\s+)$//g for values %var_h;
print Dumper \%var_h;

use strict;
use warnings;
...
my %var_h =(1 => "  value", "2" => "two  ");
s/\s+//g for values %var_h;
print Dumper \%var_h;