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create code fences with backticks ` or tildes ~
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def function(foo):
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lang-bash
-fhas nothing to do withif; it is an option for the[command, which just happens to be called using anifstatement here. Also, it just so happens that[(along withif) is built in tobash.man [in a linux terminal, you'll see that-fis an option of the[operator. From there it's apparent what-fdoes.