
One gets a different response when abbreviating collapse= in 
paste?  In the second case, it appears to be acting as if " + " is just 
another argument to be pasted.

# expected response
> paste(c("X","Y"),1:4,sep="",collapse=" + ")
[1] "X1 + Y2 + X3 + Y4"

# different!
> paste(c("X","Y"),1:4,sep="",collaps=" + ")
[1] "X1 + " "Y2 + " "X3 + " "Y4 + "

I am using R 1.7.1 on Windows 2000.  The example is taken
from MASS 2nd ed. page 42.

Is this a bug?


