resolve that all unnecessary backslashes are rejected.

bug068 is not a bug.

R=gri
OCL=14838
CL=14838

test/fixedbugs/bug068.go

@@ -4,6 +4,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// RESOLUTION: This program is illegal.  We should reject all unnecessary backslashes.
+
 package main
 
 const c = '\'';  // this works
@@ -12,6 +14,6 @@ const s = "\'";  // this doesn't
 /*
 There is no reason why the escapes need to be different inside strings and chars.
 
-uetli:~/go/test/bugs gri$ 6g bug065.go
-bug065.go:6: unknown escape sequence: '
+uetli:~/go/test/bugs gri$ 6g bug068.go
+bug068.go:6: unknown escape sequence: '
 */

test/golden.out

@@ -84,10 +84,6 @@ bugs/bug064.go:15: illegal types for operand: CALL
 	({<u><int32>INT32;<v><int32>INT32;})
 BUG: compilation should succeed
 
-=========== bugs/bug068.go
-bugs/bug068.go:6: unknown escape sequence: '
-BUG: compilation should succeed
-
 =========== bugs/bug074.go
 bugs/bug074.go:6: illegal types for operand: CONV
 	(<string>*STRING)
@@ -186,6 +182,9 @@ fixedbugs/bug051.go:10: expression must be a constant
 =========== fixedbugs/bug067.go
 ok
 
+=========== fixedbugs/bug068.go
+fixedbugs/bug068.go:8: unknown escape sequence: '
+
 =========== fixedbugs/bug070.go
 outer loop top k 0
 inner loop top i 0