Change the position pointed out by W504

[hhatto]

test environment:

$ python -V
Python 3.6.5
$ pycodestyle --version
2.4.0
$ pycodestyle --select=W --show-source target.py

input:

var = (1 &     # comment
       ~2)
(width == 0 and
 height == 0)

before:

target.py:1:8: W504 line break after binary operator
var = (1 &     # comment
       ^
target.py:3:2: W504 line break after binary operator
(width == 0 and
 ^

after:

target.py:1:10: W504 line break after binary operator
var = (1 &     # comment
         ^
target.py:3:13: W504 line break after binary operator
(width == 0 and
            ^

Thanks

[sigmavirus24]

Sorry for the delay on this!