how spiders deal with a + (plus sign)

because the topic just can't be searched

[ncreegan]

First, if this has been brought up, I apologize, but searching for anything about the + is just about impossible, thanks for your understanding.

Straightforward question though -- how do spiders deal with a term separated by plus signs as opposed to dashes?

blue+widgets/details.html
vs
blue-widgets/details.html

Much appreciated!

[macrost]

ncreegan,
I have used both and haven't noticed a bit of difference in any of the major players.