ptx(1) Info: not one single example given

[Dan Jacobson]

Sorry fellas, more abstrution in the Info manual.  Without a single
example in its Info page, the ptx(1) command is only usable to a small
elite.

Apparently it is not meant for this kind of input, as nothing happens.
$ seq 1 1 5|awk '{$2=11-NR};1'|ptx
$ ptx
$ seq 1 1 5|awk '{$2=11-NR};1'> file
$ ptx file
nor are there any warnings.

Anyway, somebody, like Barry last time with tsort, should post here
what an example input and output file for ptx should contain.  That
example should then be officially added to the next distribution.
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