Small tweak in Atom.isSpecificCaseOf; use list iterator instead of index, range, len, lookup etc.
Small tweak in Atom.isSpecificCaseOf; use list iterator instead of index, range, len, lookup etc.

nickvandewiele/RMG-Py,chatelak/RMG-Py,pierrelb/RMG-Py,nickvandewiele/RMG-Py,chatelak/RMG-Py,enochd/RMG-Py,comocheng/RMG-Py,nyee/RMG-Py,nyee/RMG-Py,comocheng/RMG-Py,enochd/RMG-Py,pierrelb/RMG-Py