Comma before and after "which"?

I am copy editing some academic text as a freelancer, and I have
sentences like the following:

"We can see two curves which, on close inspection, are almost
identical."

The in-house copy editor keeps correcting this by adding an extra comma
before "which". I feel this is an unnecessary pause. Could I have an
opinion, and if you think I am right, a reference to show them the
reason the comma is not needed.

--
Kaveh
.

Relevant Pages

  • Re: Comma before and after "which"?
    ... > I am copy editing some academic text as a freelancer, ... > "We can see two curves which, on close inspection, are almost ... > The in-house copy editor keeps correcting this by adding an extra comma ... and the correct form is "We can see two curves ...
    (alt.usage.english)
  • Re: Comma before and after "which"?
    ... > I am copy editing some academic text as a freelancer, ... > The in-house copy editor keeps correcting this by adding an extra comma ... do whatever the in-house copyeditor wants ...
    (alt.usage.english)