Related: Problems With the test Builtin: What Does -a Mean? http://www.oilshell.org/blog/2017/08/31.html http://www.oilshell.org/blog/2017/08/31.html The POSI

Related: Problems With the test Builtin: What Does -a Mean? http://www.oilshell.org/blog/2017/08/31.html http://www.oilshell.org/blog/2017/08/31.html The POSIX spec did indeed make things cleaner; the last section quotes it and gives some style advice.