doc: Fix formatting

doc/connection.rst

@@ -57,7 +57,7 @@ class that implements the following methods.
        most ANSI escape sequences striped out before returning.
    :param will_succeed: The command is assumed to always succeed, unless there is
        an issue in the environment like the loss of network connectivity. That
-       will make the method always raise an instance of a subclass of 
+       will make the method always raise an instance of a subclass of
        :class:`DevlibTransientError' when the command fails, instead of a
        :class:`DevlibStableError`.