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

[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?