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I also like how Raku has extended this with the Q operator, allowing one to specify what should be interpolated (scalars, escape sequences, closures, etc) also with arbitrary delimiters --

   Q/I got $5 \sigh /   # literal
   Q:s/Hello $name/     # just scalars
   Q:b/hello world\n/   # just backslash escape sequences

That may be a good candidate of something to port back when Perl 7 gets to the stage of adding new features.

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