Revert ob-literate

Ignore-this: b6495923d09cb30eac72897a683e80a

darcs-hash:20140305132409-3ca48-56e3aa54d6a85e40a61b853917c19848a292a641
fix "a" rule

Ignore-this: c6b49426daba84a6ebb85883e6c69ca1

darcs-hash:20140305132815-3ca48-938ddda9841a4b9ba7363b6bf384fa4c6d6e038f
fix "want"

Ignore-this: b23b152614ce302ac71f7bf099a96161

darcs-hash:20140305145610-3ca48-ce1ba32870624da25bb14735a6b5ffb1d40526e2