[S02] Fixed double angle bracketed formatting code.

S02-bits.pod

@@ -2004,7 +2004,7 @@ the result back to the same object.  The C<.perl> method will return
 a representation of the object on the assumption that, if the code is
 reparsed at some point, it will be used to regenerate the object as a
 scalar in item context.  If you wish to interpolate the regenerated
-object in a list context, it may be necessary to use C<<prefix:<|> >>
+object in a list context, it may be necessary to use C<< prefix:<|> >>
 to force interpolation.
 
 Note that C<.perl> has a very specific definition, and it is expected that