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- # tests of return value inversion
- # placeholder for future expansion
- # user subshells (...) did this wrong in bash versions before 2.04
- ! ( echo hello | grep h >/dev/null 2>&1 ); echo $?
- ! echo hello | grep h >/dev/null 2>&1 ; echo $?
- ! true ; echo $?
- ! false; echo $?
- ! (false) ; echo $?
- ! (true); echo $?
- ! true | false ; echo $?
- ! false | true ; echo $?
- ! (true | false) ; echo $?
- ! (false | true) ; echo $?
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