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perl -MO=Deparse -e " s///g " perl -MO=Deparse -e " s\\\g " ... perl -MO=Deparse -e " s {}[]g " perl -MO=Deparse -e " s {}<>g " perl -MO=Deparse -e " s<><>g "
s///g; -e syntax OK
$ perl -MO=Deparse -e " s«»«»g " Substitution replacement not terminated at -e line 1. $ perl -MO=Deparse -e " s«««g " s///g; -e syntax OK