Incorrect line terminator on Windows

If the .terminator variable is set to "\n", "\r\n" will still be used in the output on windows.

Following can be used to reproduce.

GSL 

```
.output "test.html"
.terminator="\n"
<html>
</html>
```

XML

```
<?xml version="1.0"?>
<test script = "test.gsl" >
</test>
```


