20.7.1: Function shell-command calls shell-mode for asynchronous commands

[Francis Litterio]

In Emacs 20.7.1, in the function shell-command, there's a call to
shell-mode in the control path that's followed for asynchronous commands
(e.g., "command &").  Therefore, the buffer named "*Async Shell Command*"
is always in shell-mode, even though it contains no interactive shell.

This hides some fundamental-mode keybindings for no useful purpose (since
there's no interactive shell in that buffer).
--
Francis Litterio
franl@world.std.com
http://world.std.com/~franl/
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