But! 

perl -MO=Terse -E'our $str; $str = $str . " ";'

[download]
and 
perl -MO=Terse -E'our $str; $str .= " ";'

[download]

In reply to Re^2: Perl Concatenate vs Append Operator by Anonymous Monk
in thread Perl Concatenate vs Append Operator by nande9

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