1 ./shopt.tests: shopt: illegal option: -z
2 shopt: usage: shopt [-pqsu] [-o long-option] optname [optname...]
11 shopt -s expand_aliases
18 shopt -s interactive_comments
24 shopt -u shift_verbose
33 shopt -s expand_aliases
35 shopt -s interactive_comments
53 shopt -u shift_verbose
90 set +o interactive-comments
114 interactive-comments off
138 set +o interactive-comments
167 set +o interactive-comments
184 interactive-comments off
188 ./shopt.tests: shopt: xyz1: unknown shell option name
189 ./shopt.tests: shopt: xyz1: unknown option name