fixes #739

[xconverge]

Weird bug, weird fix, but I am ok with it if you are

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[johnfn]

How does this handle, say, c} in the same situation?

I think this may be a special case on w, not c.
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[xconverge]

hah ok so you are right, I fixed this on w, however c} does not work right (and did not before so I will fix that as well since you brought it up)

[rebornix]

Just one comment and you may also want to write a simple test to cover this scenario.

[johnfn]

I don't understand why this behavior would happen for cw but not dw. I see two possibilities:

1. We have another special case handling thing in d. If so, we should move both into w.
2. We are not handling dw as a special case, but it happens to work anyway. If so, this is very strange and worrying, and we should figure out the source of the strangeness and worrisomeness.

[xconverge]

@johnfn what is the special case I have in "c" now?

[johnfn]

My bad, @xconverge. I misread your PR. (And also I completely missed your reply. I have trouble with Github's notification system...) It looks good to me. If you bring it up to date, I'll merge it! :)