[texdoc] option parsing

[Manuel Pégourié-Gonnard]

Karl Berry a écrit :
> The texdoc --help message seems out of sync with reality (or something).
> 
The reality was wrong, I fixed it. (Well, not the whole reality...)

> Also, I strongly suggest that when there is an unknown option, texdoc
> prints
>   Try `texdoc --help' for more information.
> instead of the whole lengthy help message.  (As with, e.g., cp --foo.)

Right (and point the the pdf manual too). r28 as well as the other help tweaks
you suggest.

m