you can modify their contents via the empty angle brackets: <>. I don't think you can do that with glob ...

Well, this is the one case where I prefer angle brackets (in this special case often refered to as "the diamond operator") over the readline function.

You were right about this not being able with glob, as empty angle bracket expressions are handled by readline :) <> eq <ARGV> eq readline *ARGV (but only if the three lines (records) are stringologically equal).

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