add help on --info

qgpg/__init__.py

@@ -124,6 +124,8 @@ Usage
   GPGPASS=mysecretpassword qgpg --key ./mykey --decrypt file.gpg file.txt
 - Symmetric encryption (Just leave out the --key):
   qgpg --encrypt file.txt file.gpg
+- Check who owns the private key:
+  qgpg --info --key ./mykey
 
 """,
     )