On Oct 12 23:23:18, t...@math.ethz.ch wrote:
> > Let me clarify the idea. 
> > If a filter recognizes '-' as a name for stdin,
> > then stdin can be one of the _multiple_ files being processed.
> > Filters that do not recognize '-' as a name, on the other hand,
> > only process stdin if it is the _only_ input.
> I understand that - is convenient, but it's not strictly needed.
> If you need the standard input as one of several files (or as an
> explicit file argument), you can pass /dev/stdin.

This is probably what I was missing.
Thank you. Sorry for the noise.

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