turn doc string into a comment

cheroot/ssl/pyopenssl.py

@@ -159,15 +159,13 @@ def read(self, *args, **kwargs):
         )
 
     def sendall(self, *args, **kwargs):
-        """Send whole message to the socket.
-
-        Not supported due to https://github.com/pyca/pyopenssl/issues/176.
-        Until that bug is fixed, sendall() may throw SSL.WantWriteError, but
-        there is no correct way to retry the call because we don't know how
-        many bytes were already transmitted. We could work around this by
-        reimplementing sendall() using send(), but we don't actually use
-        sendall() anywhere.
-        """
+        """Send whole message to the socket. Unsupported, do not use."""
+        # Not supported due to https://github.com/pyca/pyopenssl/issues/176.
+        # Until that bug is fixed, sendall() may throw SSL.WantWriteError, but
+        # there is no correct way to retry the call because we don't know how
+        # many bytes were already transmitted. We could work around this by
+        # reimplementing sendall() using send(), but we don't actually use
+        # sendall() anywhere.
         raise NotImplementedError('sendall() is unsupported by pyOpenSSL')
 
     def send(self, *args, **kwargs):