https://mailman.astron.com/pipermail/tcsh/2019-November/36.html
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https://bugs.launchpad.net/bugs/1862333
Title:
tcsh regex [] error
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Public bug reported:
on 18.04.4
~/Temp/t> tcsh --version
tcsh 6.20.00 (Astron) 2016-11-24 (x86_64-unknown-linux) options
wide,nls,dl,al,kan,sm,rh,nd,color,filec
~/Temp/t> ls
1 2 3 4 5
~/Temp/t> ls [2-3]
2 3
~/Temp/t> ls [1-3]
1 2 3
however on 19.10
~/Temp/t>> tcsh --version
tcsh 6.21.00
