Change < to -f in examples with input files

Folks,

Please find enclosed a patch, per Dennis Björklund, that uses -f for
input files rather than <.  This makes error messages, &c. more
expressive.

Cheers,
D
--
David Fetter david@fetter.org http://fetter.org/
phone: +1 510 893 6100   mobile: +1 415 235 3778

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