can't you tell me "unknown option" before drawing windows?

[Dan Jacobson]

Starting emacs with an unknown option, e.g.,
$ emacs -nv filename
should fail right there on the command line, instead of having to wait
for emacs to bring up its windows, etc. just to tell you the same
thing: "unknown option."

emacs --help doesn't need to set up all of emacs to give you its
output, so why should mistakes like emacs ---help, etc.

maybe emacs should check around all the places it wants to check for all
legal options before starting to draw windows.
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