[AUCTeX] Splitting an environment

[David Kastrup]

Quite often I have an existing environment (macrocode, but also
enumerate and some others), where, in the middle of it, I'd want to
insert

%    \end{macrocode}
% <- cursor here
%    \begin{macrocode}

Maybe C-u C-c ] should do that?  End an environment, open a new one
(possibly asking for the necessary arguments?).

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum