For example, [W-c] is equivalent to [][\^_`wxyzabc], matched caselessly, and if character tables for the "fr "locale are in use, [\xc8-\xcb] matches accented E characters in both cases.
Par exemple, "[C-c]" est équivalent é "[][\^_`wxyzabc]", avec l'option d 'insensibilité de casse.