Check atoms are in the same chain always False

[EyalRozenberg1]

Describe the bug
While you calculate covalent edges based on atomic distances, you check whether two atoms are in the same chain or not. The condition you use there is wrong, and will always return False.

To Reproduce
Steps to reproduce the behavior:

1. Go to :

graphein/graphein/protein/edges/atomic.py

Line 137 in 553fd26

if not (chain_1 and chain_2):

2. The not (chain_1 and chain_2) condition is always False.

To Fix
Replace to not (chain_1 == chain_2) for the expected behavior.

best, Eyal

[a-r-j]

Thanks for the report, Eyal! Should be fixed in 1.5.1 :)