`` strings may span multiple lines

R=rsc
DELTA=3  (2 added, 0 deleted, 1 changed)
OCL=30511
CL=30513

src/pkg/go/scanner/scanner.go

@@ -331,7 +331,7 @@ func (S *Scanner) scanRawString(pos token.Position) {
 	for S.ch != '`' {
 		ch := S.ch;
 		S.next();
-		if ch == '\n' || ch < 0 {
+		if ch < 0 {
 			S.error(pos, "string not terminated");
 			break;
 		}

src/pkg/go/scanner/scanner_test.go

@@ -63,6 +63,8 @@ var tokens = [...]elt{
 	elt{ token.CHAR, "'\\uff16'", literal },
 	elt{ token.CHAR, "'\\U0000ff16'", literal },
 	elt{ token.STRING, "`foobar`", literal },
+	elt{ token.STRING, "`" `foo
+	                        bar` "`", literal },
 
 	// Operators and delimitors
 	elt{ token.ADD, "+", operator },