>From the "test invocation" node in the manual: # `test' has an alternate form that uses opening and closing square # brackets instead a leading `test'. For example, instead of `test -d # /', you can write `[ -d / ]'. The square brackets must be separate # arguments; for example, `[-d /]' does not have the desired effect. # Since `test EXPR' and `[ EXPR ]' have the same meaning, only the former # form is discussed below.
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