Error in atom.py

[Ruite Xiang]

In the function readPDBString, there is an instance, self.x that reads the coordinates of the pdb files.

Currently self.x=[float(line[30:38]), float(line[39:46]), float(line[47:54])]

But it should be self.x=[float(line[30:38]), float(line[39:46]), float(line[46:54])]