This is the revision history for a-z in <freenode.net:#regex>

factoid_idsubjectcopulapredicateauthornamespace
11782 a-z is /[A-z]/ does not mean what you might think. You should use /[A-Za-z]/ or /[a-z]/i, unless you wish to include these characters: [ \ ] ^ _ ` digitok
11777 a-z is /[A-z]/ does not mean what you might think. You should use /[a-zA-Z]/ or /[a-z]/i, unless you wish to include these characters: [ \ ] ^ _ ` digitok
11776 a-z is /[A-z]/ does not mean what you think it does. You should use /[a-zA-Z]/ or /[a-z]/i, unless you wish to include these characters: [ \ ] ^ _ ` digitok
11775 a-z is /[A-z]/ does not mean what you think. You should use /[a-zA-Z]/ or /[a-z]/i unless you wish to include these characters: [ \ ] ^ _ ` digitok
11774 a-z is /[A-z]/ does not mean what you think. You should use /[a-zA-Z]/ or /[a-z]/i unless you wish to include these characters: [ \ ] ^ _ ` digitok