builtins2.sub « tests - vyatta-bash.git - Vyatta shell based on GNU Bourne Again SHell (mirror of https://github.com/vyos/vyatta-bash.git)

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# test behavior of shopt xpg_echo

USG_ECHO=off
shopt -q xpg_echo && USG_ECHO=on

shopt -u xpg_echo
echo 'a\n\n\nb'

shopt -s xpg_echo
echo 'a\n\n\nb'