How to detect extraneous content in clearsigned (--clearsign) files?

[Patrick Schleizer]

Patrick Schleizer:
> Werner Koch:
>> On Mon, 12 Jan 2015 19:52, patrick-mailinglists at whonix.org said:
>>
>>> However, what works for me is this:
>>>
>>> gpg --output ./out --verify ./sha512sums.asc
>>
>> We are both wrong.  --verify does only a verify and nothing else.
>> Running without --verify writes the actual signed data to the file.
> 
> Indeed.
> 
> What I wanted to write in my previous mail...
> 
> However, what works for me is this:
> 
> gpg --output ./out --decrypt ./sha512sums.asc
> 
> Adding --decrypt or not has the same result?

Can answer my own question:
Using --decrypt for verification only is a really bad idea in scripts -
gpg would still exit 0 if file is encrypted, but unsigned.