update TODO
work on open_stmt translation; declare() now threads decls up parent chain
temporarily disable open_stmt translation
update IDENTITY
update TODO
shorten ppp_bcast calls in sms$serial rollout
update IDENTITY
update TODO
expose Open_Stmt translation
update IDENTITY
pppvar back to logical
update IDENTITY
remove unnecessary initialization of iostat and err vars in Open_Stmt#translate
update IDENTITY
spaces after io-stmt keywords (unlike function/subroutine calls)
update TODO
first-draft close_stmt translation (copied from open_stmt verbatim)
update IDENTITY
factor common translate() into class IO_Stmt
translate backspace, endfile, rewind statements (all use IO_Stmt)