-rk: Suppress comments about RATFOR translation (FTANGLE)

By default, the RATFOR translator writes comments about what command it is translating. The -rk option suppresses those comments. Arguments to this option allows one to suppress comments about only particular commands, according to the following list:

     b -- break
     c -- case
     t -- default
     d -- do
     f -- for
     i -- if
     n -- next
     p -- repeat, until
     r -- return
     s -- switch
     h -- where
     w -- while
     

For example, one can say -rkrb to suppress comments about the return and break statements.