[BUG] Expected outputs in tests need to be updated

**Describe the bug**
Two expected outputs are stale
```
mixed-function-expression-with-pointer-capture
mixed-test-parens
```

**To Reproduce**
See the failing workflow run here.

https://github.com/modern-cmake/cppfront/pull/9

**Additional context**
The workflow doesn't show the diff of the failure, yet, unfortunately. 
