./errors.tests: line 246: kill: -s: option requires an argument
./errors.tests: line 248: kill: S: invalid signal specification
./errors.tests: line 250: kill: `': not a pid or valid job spec
-kill: usage: kill [-s sigspec | -n signum | -sigspec] [pid | job]... or kill -l [sigspec]
+kill: usage: kill [-s sigspec | -n signum | -sigspec] pid | jobspec ... or kill -l [sigspec]
./errors.tests: line 255: set: trackall: invalid option name
./errors.tests: line 262: `!!': not a valid identifier