[plug] switches for if, etc.

[John Knight]

LOL, no wonder I didn't find it!

"...it was brilliant, there was three up against a thousand, and boy, did we 
give those three heaps!"
>
>Perhaps you are referring to a construct such as this:
>
>     if [ -z blah ]; then
>
>All this does is run the programme named [. Yes, there is a programme
>named [. To find out the switches, use `man [` (or `man test`). Also,
>you may find that tab-completion is available (it is in zsh, at least).

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