Changed accidentally used & operator to &&.
/* $Id$ */
digraph sii {
start_reading [fontname="Helvetica"]
start_reading -> read_check [weight=5]
read_check [fontname="Helvetica"]
read_check -> error
read_check -> read_fetch [weight=5]
read_fetch [fontname="Helvetica"]
read_fetch -> error
read_fetch -> end [weight=5]
read_fetch -> read_fetch
start_writing [fontname="Helvetica"]
start_writing -> write_check [weight=5]
write_check [fontname="Helvetica"]
write_check -> error
write_check -> write_check2 [weight=5]
write_check2 [fontname="Helvetica"]
write_check2 -> error
write_check2 -> end [weight=5]
write_check2 -> write_check2
end [fontname="Helvetica"]
error [fontname="Helvetica"]
}