It's time to get the latest Perl book!
AFAICT, they first showed up in the 3rd Edition Camel as "V-String Literals" and in the 4th ed as "Version Literals".
And by the way, welcome to the Monastery!
In reply to Re^3: Undocumented Perl Functionality
by haukex
in thread Undocumented Perl Functionality
by bobo999
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