http://perldoc.perl.org/perlfaq4.html#How-can-I-split-a-%5bcharacter%5d-delimited-string-except-when-inside-%5bcharacter%5d%3f

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[doc://perlfaq4#How-can-I-split-a-%5bcharacter%5d-delimited-string-except-when-inside-%5bcharacter%5d%3f]