Indentation issues in /src/common/helpers.py
Python complains about mixing of tabs and spaces in /src/common/helpers.py.
I made a big patch, which simply clean up tab and space. Basically, I have converted all tab into 4 space, and fixes some identation issues at line 560 and jus after.
Ah, and I fix a typo in comment ;)
Feel free to use it or not.