update to new communications syntax
R=gri
OCL=15417
CL=15417
diff --git a/doc/go_tutorial.txt b/doc/go_tutorial.txt
index fb6717e..6ce7b60 100644
--- a/doc/go_tutorial.txt
+++ b/doc/go_tutorial.txt
@@ -456,18 +456,17 @@
--PROG progs/sieve.go /Send/ /^}/
The function "Generate" sends the sequence 2, 3, 4, 5, ... to its
-argument channel, "ch", using the binary send operator "-<".
+argument channel, "ch", using the binary communications operator "<-".
Channels block, so if there's no recipient for the the value on "ch",
the send operation will wait until one becomes available.
The "Filter" function has three arguments: an input channel, an output
channel, and a prime number. It copies values from the input to the
-output, discarding anything divisible by the prime. The unary prefix
+output, discarding anything divisible by the prime. The unary communications
operator "<-" (receive) retrieves the next value on the channel.
--PROG progs/sieve.go /Copy/ /^}/
-
The generator and filters execute concurrently. Go has
its own model of process/threads/light-weight processes/coroutines,
so to avoid notational confusion we'll call concurrently executing
@@ -567,9 +566,7 @@
listed by its cases can proceed. If all are blocked, it waits until one can proceed; if
multiple can proceed, it chooses one at random. In this instance, the "select" allows
the server to honor requests until it receives a quit message, at which point it
-returns, terminating its execution. (The language doesn't yet allow the ":="
-syntax in "select" statements, although it might one day. Also, observe the use
-of the binary, infix form of the receive operator.)
+returns, terminating its execution.
All that's left is to strobe the "quit" channel
