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bash conversion trouble.



Gentlemen:


I'm trying to convert a long script from bash, which I know not at all, to zsh, which I know hardly better:

bash likes thisbut zsh throws a syntax error:

    case "${USE_OVERLAYFS,,}" in

zsh likes this:

    case "${USE_OVERLAYFS}" in

and I can't see what the pair of commas would do anyway and I'm afraid to ask. Will they be missed?




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