incorrect op TEST & TESTSET

Input:
```lua
local sqTolerance = tolerance ~= nil and tolerance^2 or 1
```
Output:
```lua
var113 = var11 ^ 2
if var1 == nil or not var113 then var3 = 1
end
```
Note: The result generated from the TEST (and probably also TESTSET) returns an invalid IF statement instead of valid ternary.