[Rd] gzfile text value

[Mick Jordan]

I'm puzzled why gzfile (which the spec says the default mode is "rb") 
shows mode="rb" but text="text" from summary when it is in lazy state:

  cc <- gzfile("ll.rds")
cc <- gzfile("ll.rds")
 > summary(cc)
summary(cc)
$description
[1] "ll.rds"

$class
[1] "gzfile"

$mode
[1] "rb"

$text
[1] "text"

$opened
[1] "closed"