*Occur in buf*?

[Marshall, Simon]

I frequently use M-x occur in several different buffers, in order to
compare the occur results from the different buffers.  Trouble is, M-x
occur always writes to *Occur*, so if I do several M-x occurs in
different buffers I have to rename each *Occur* buffer to make it
unique.  It's inconvenient, and if I do this frequently the number of
*Occur*<n> buffers gets out of hand.  Sure, I could M-x kill-buffer
before M-x occur M-x rename-uniquely.

IWBNI M-x occur created an *Occur in buf* buffer so that I wouldn't have
to do this, rather than *Occur*.

It doesn't seem an outrageous request, after all, the *Occur* buffer is
necessarily tied to a particular originating buffer.