Wrapping of condition within generator

Given:
``` python
all(
    x or x.upper()
    for x in ""
)
```
Wrapping the `or` gives:
``` python
all(
    x or
    x.upper()
    for x in ""
)
```
Where I had expected:
``` python
all(
    (
        x or
        x.upper()
    )
    for x in ""
)
```
