I prefer the classic™ #-annotation style ;-) Something along 

{ #-------------------  classic annotation style  ------------
    my $x = 5;
    print "small calc $x\n";
} #-----------------------------------------------------------

[download]
just giving some kind of visual hint. Many editors allow to fold a block just displaying a comment instead (i.e. Emacs folding-mode) which might be helpful too.

In reply to Re: Annotation of Anonymous Blocks by Perlbotics
in thread Annotation of Anonymous Blocks by Anonymous Monk

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