Excludes
```
sorted(obj for obj in iterator
       if some_long_cond()
          and some_other_cond())
```
from E127.

It is true that this also lets through some "bad" indents e.g.
```
(1 if a and 2 else
      b)
```
but at the tokenization level it is quite difficult to distinguish
between the "if" in `a for b in c if d` and the "if" in `a if b else c`,
which play quite different roles.