ifs

[Alan Watson <alan@oldp.astro.wisc.edu>]

Whilst testing a read that performs ifs splitting, I discovered to my
surprise that ifs is not exported into the environment and so is
initialized to the standard space, tab, and newline whenever rc is
run.  One consequence of this is that the following two commands are
different:

	ifs = ( : $nl ) rc -c 'line = `{ sed 1q /etc/passwd } ; echo $line'
	rc -c 'ifs = ( : $nl ) ; line = `{ sed 1q /etc/passwd } ; echo $line'

Is this really the correct behaviour?  I can understand this choice
with regard to IFS and sh because of the IFS loophole, but this does
not apply to rc.