users confusing selfupdate and sync

[Jeremy Lavergne]

> I have my own little shell script that does (amongst other things)
>
> sudo port -v selfupdate
> sudo port outdated
> #sudo port upgrade outdated
> #sudo port uninstall -f inactive
> echo All Done
>
> The commented lines are because a few versions of Macports ago, if  
> you tried
> sudo port upgrade outdated
> and "outdated" was nothing, ie nothing needed upgrading, then there  
> was a very confusing error message.
>
> But I've just tried it in 1.8.1 and although it could be slightly  
> better it's not as bad as it once was.
>
> iMac:~ $ sudo port upgrade outdated
> Error: No ports matched the given expression
>
> "There are no upgrades available in MacPorts for your installed  
> ports."
> is perhaps a clearer message for users in this case.

This happens because the expansion of commands is done right to left.   
We don't know that we're upgrading until after we've tried to match  
"outdated."

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