documentation fixed

Rev: doc/index.bmml:1.3
Rev: doc/lpc/cast:1.1
Rev: doc/lpc/functions:1.2
Rev: doc/lpc/modifier:1.1
Rev: doc/lpc/reserved:1.3(DEAD)
Rev: doc/lpc/reserved.bmml:1.1
Rev: doc/manual/example1:1.3
Rev: doc/manual/example2:1.2
Rev: doc/manual/example3:1.2
Rev: doc/simulated/write_file:1.3
Rev: doc/types/mixed:1.1
Rev: doc/types/program:1.4
Rev: doc/types/string:1.4