gvim --help

What magic is gvim doing to hide its documentation?

I understand this:
[marc@nixos:~]$ gvim --help 1> /tmp/file; ls -l /tmp/file
3326 (bytes in /tmp/file)

I'd expect stdout to be printed to my console
[marc@nixos:~]$ gvim --help 2> /tmp/file; ls -l /tmp/file
0 (bytes in /tmp/file)

I'd expect stdout to be written to the file
[marc@nixos:~]$ bash -c "(gvim --help) >/tmp/file 2>&1" ; ls -l /tmp/file
0 (bytes in /tmp/file)

So why is gvim hiding its documentation when stderr is redirected to a
file?

Marc Weber

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