[m-rev.] trivial diff: avoid a warning in samples/rot13

[Zoltan Somogyi]

On 11-Sep-2006, Ralph Becket <rafe at csse.unimelb.edu.au> wrote:
> Julien Fischer, Monday, 11 September 2006:
> > (Perhaps it ought to be turned off by default?)
> 
> I'd say so.

I'd say it should stay turned on. The original writer of the code may know
what he/she meant, but later readers cannot assume this (unless the writer
puts in a comment to that effect, but then renaming would accomplish that
objective even more clearly).

Zoltan.
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