joe 0fbb93fc97 update sample code, more neatly %!s(int64=4) %!d(string=hai) anos
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echo_client.go 0fbb93fc97 update sample code, more neatly %!s(int64=4) %!d(string=hai) anos
echo_protocol.go 09ab63008c format sample code %!s(int64=4) %!d(string=hai) anos
echo_server.go 0fbb93fc97 update sample code, more neatly %!s(int64=4) %!d(string=hai) anos