Fix tests

testdata/scripts/literals.txt

@@ -45,8 +45,8 @@ grep '^\s+\w+ := \[\.{3}\](byte|uint16|uint32|uint64)\{[0-9\s,]+\}$' .obf-src/ma
 # Split obfuscator. Detect decryptKey ^= i * counter
 grep '^\s+\w+ \^= \w+ \* \w+$' .obf-src/main/z0.go
 
-# XorShuffle obfuscator. Detect data = append(data, x ^ y...)
-grep '^\s+\w+ = append\(\w+,(\s+\w+\[\d+\]\^\w+\[\d+\],?)+\)$' .obf-src/main/z0.go
+# XorShuffle obfuscator. Detect data = append(data, x (^|-|+) y...)
+grep '^\s+\w+ = append\(\w+,(\s+\w+\[\d+\][\^\-+]\w+\[\d+\],?)+\)$' .obf-src/main/z0.go
 
 # XorSeed obfuscator. Detect type decFunc func(byte) decFunc
 grep '^\s+type \w+ func\(byte\) \w+$' .obf-src/main/z0.go