shell/hush_test/hush-psubst/emptytick.tests


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true;  ``; echo $?
false; ``; echo $?
true;  `""`; echo $?
false; `""`; echo $?
true;  `     `; echo $?
false; `     `; echo $?

true;  $(); echo $?
false; $(); echo $?
true;  $(""); echo $?
false; $(""); echo $?
true;  $(     ); echo $?
false; $(     ); echo $?

true;  exec ''; echo $?
false; exec ''; echo $?