Mark or remove unused arguments.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Properly notate the use of eval.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Prevent misparsing of a parenthesized expression.

Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>