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$ echo It’s easy | perl -pe"s/’/'/g;"
It's easy
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$ perl -Cio -pe"s/’/'/g;" <( echo "It’s easy" )
Wide character in print at -e line 1, <> line 1.
It’s easy
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$ perl -CiO -Mutf8 -pe"s/’/'/g;" <( echo "It’s easy" )
It's easy
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$ echo "It’s easy" | perl -CIO -Mutf8 -pe"s/’/'/g;"
It's easy
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perl -CiIO -Mutf8 -pe"s/’/'/g;"
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perl -CSD -Mutf8 -pe"s/’/'/g;"