dired to "view" a dir, tar-mode to "view" a tar

[Dan Jacobson]

Being a dired-x or whatever user, when one hits RET on a file like
cwb.tar.gz, one gets "Tar Narrow" mode, as seen in the modeline.

If one hits v on it, one gets "Tar View Narrow" mode, as seen in the
modeline.

One then hits C-h m and sees
SPC             tar-next-line

However, this has been hijacked by view mode, as one sees further
down.  OK, blame me.  I hit v meaning "just look at the file, I don't
plan to edit it".  Hey wait, when I hit v on a directory, I
thankfully don't get view-mode's sticky fingerprints all over that
buffer.  OK, never mind. Over and out.
-- 
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