(resending this from private account without the silly company "Confidelity note")
In the section https://www.gnu.org/software/bash/manual/bash.html#Conditional-Constructs in the description of the "case" command there is no mention (as far as I can see, it doesn't follow from the documented expansions etc.) that a _pattern_ undergoes quote removal, but it does [see e. g. case aa in a""a) echo match;; esac]. (One might think it does self-evidently in the process of "Shell Expansions" performed on the command line, but this expansion series is not performed on the case command's _word_ and patterns - they for example don't undergo brace expansion -; for _word_, it is explicitly said: "The _word_ undergoes tilde expansion, parameter expansion, command substitution, arithmetic expansion, and quote removal …"; for _pattern_: "Each _pattern_ undergoes tilde expansion, parameter expansion, command substitution, and arithmetic expansion." - quote removal is missing.) To rectify it, I suggest to change and simplify these sentences from The _word_ undergoes tilde expansion, parameter expansion, command substitution, arithmetic expansion, and quote removal (see Shell Parameter Expansion) before matching is attempted. Each _pattern_ undergoes tilde expansion, parameter expansion, command substitution, and arithmetic expansion. to The _word_ and each _pattern_ undergo tilde expansion, parameter expansion, command substitution, arithmetic expansion, and quote removal (see Shell Parameter Expansion) before matching is attempted. -- Best regards, Dietmar Schindler
