`` strings should not accept newlines as characters

R=r
DELTA=17  (17 added, 0 deleted, 0 changed)
OCL=30417
CL=30422

test/bugs/bug164.go

+// $G $D/$F.go
+
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+// Multi-line string literal do not allow newline chars according to spec
+// but 6g accepts this code with the newlines interpreted as newlines.
+
+const s = `
+Hello, World!
+`
+
+func main() {
+	print(s)
+}

test/golden.out

@@ -108,6 +108,9 @@ BUG: should fail
 =========== bugs/bug163.go
 BUG: should not compile
 
+=========== bugs/bug164.go
+BUG: should not compile
+
 =========== fixedbugs/bug016.go
 fixedbugs/bug016.go:7: constant -3 overflows uint