Fix all E201 and E202 style errors

using the following command:
```
autopep8 -i -r --exclude $(sed -e 's|^|./|' -e 's|/$||' .ci/flake8_blacklist.txt | paste -sd,) --select E201,E202 .
```

tools/data_source/fetch.py

@@ -8,7 +8,7 @@ import sys
 
 from six.moves.urllib.request import urlopen
 
-assert sys.version_info[:2] >= ( 2, 4 )
+assert sys.version_info[:2] >= (2, 4)
 
 BUFFER = 1048576