"Do-Blocks-Backwards (Block-Var Component [Ends] [Result-Form]) {Declaration}* {Form}*
Like Do-Blocks, only iterate over the blocks in reverse order."
(unless (member ends '(nil :head :tail :both))
"Do-Blocks-Backwards (Block-Var Component [Ends] [Result-Form]) {Declaration}* {Form}*
Like Do-Blocks, only iterate over the blocks in reverse order."
(unless (member ends '(nil :head :tail :both))