Python, doc: Minor style improvement

* lang/python/src/core.py (Context): Retab and shorten
max line length.

lang/python/src/core.py

@@ -363,7 +363,8 @@ class Context(GpgmeWrapper):
         Returns:
         plaintext       -- the decrypted data (or None if sink is given)
         result          -- additional information about the decryption
-        verify_result	-- additional information about the valid signature(s) found
+        verify_result   -- additional information about the valid
+                           signature(s) found
 
         Raises:
         UnsupportedAlgorithm -- if an unsupported algorithm was used