I would agree with the printf being a trap without a formatting string. However I would disagree that C-style for loops are more error-prone than the double-dot operator. I disagree, however, that c-style loops are harder to understand.
I personally find it much harder to mentally parse the for my $i ( 1 .. $counter ) because it forces me to remember whether the .. operator is a toggle or a list generator, and then I have to wonder if list generation is less efficient than the C-style comparison and increment operators.
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