- """Check the signature of a file and return the fingerprint if the
-signature is valid or 'None' if it's not. The first argument is the
-filename whose signature should be checked. The second argument is a
-reject function and is called when an error is found. The reject()
-function must allow for two arguments: the first is the error message,
-the second is an optional prefix string. It's possible for reject()
-to be called more than once during an invocation of check_signature().
-The third argument is optional and is the name of the files the
-detached signature applies to. The fourth argument is optional and is
-a *list* of keyrings to use. 'autofetch' can either be None, True or
-False. If None, the default behaviour specified in the config will be
-used."""
+ """
+ Check the signature of a file and return the fingerprint if the
+ signature is valid or 'None' if it's not. The first argument is the
+ filename whose signature should be checked. The second argument is a
+ reject function and is called when an error is found. The reject()
+ function must allow for two arguments: the first is the error message,
+ the second is an optional prefix string. It's possible for reject()
+ to be called more than once during an invocation of check_signature().
+ The third argument is optional and is the name of the files the
+ detached signature applies to. The fourth argument is optional and is
+ a *list* of keyrings to use. 'autofetch' can either be None, True or
+ False. If None, the default behaviour specified in the config will be
+ used.
+ """