Update docs, make test more resilient across different GnuPG versions.

Author: vsajip

docs/index.rst

@@ -769,7 +769,7 @@ To decrypt a message, use the following approach::
 
 If you want to decrypt data in a file (or file-like object), use::
 
-    >>> decrypted_data = gpg.decrypt_file(stream) # e.g. after stream = open(filename, "rb")
+    >>> decrypted_data = gpg.decrypt_file(stream) # e.g. after stream = open(filename, 'rb')
 
 These methods both return an object such that ``str(decrypted_data)`` gives the
 decrypted data in a non-binary format. If decryption succeeded, the returned object's
@@ -845,6 +845,24 @@ you can test the trust level against known values as in the following example::
 .. versionadded:: 0.3.1
    The ``trust_level`` and ``trust_text`` attributes were added.
 
+
+Finding the recipients for an encrypted message
+-----------------------------------------------
+
+Sometimes, it's desirable to find the recipients for an encrypted message, without
+actually performing decryption. You can do this using the :meth:`get_recipients` or
+:meth:`get_recipients_file` methods:
+
+    >>> ids = gpg.get_recipients(data)
+
+or, with a file or file-like object:
+
+    >>> ids = gpg.get_recipients_file(stream) # e.g. after stream = open(filename, 'rb')
+
+.. versionadded:: 0.4.8
+   The ``get_recipients`` and ``get_recipients_file`` methods were added.
+
+
 Signing and Verification
 ========================
 

test_gnupg.py

@@ -1240,8 +1240,8 @@ def test_no_such_key(self):
             self.remove_all_existing_keys()
             decrypted = gpg.decrypt(str(encrypted), passphrase='bbrown')
             self.assertFalse(decrypted.ok)
-            expected = 'decryption failed' if gpg.version == (2, 3, 1) else 'no secret key'
-            self.assertEqual(decrypted.status, expected)
+            expected = {'decryption failed', 'no secret key', 'no data was provided'}
+            self.assertIn(decrypted.status, expected)
         finally:
             logger.debug("test_no_such_key ends")