Support of ``is`` operator
Support of ``is`` operator

kustomzone/Rusthon,rootfs/Rusthon,rusthon/Rusthon,rootfs/Rusthon,PythonJS/PythonJS,kustomzone/Rusthon,chiyama/PythonJS,rusthon/Rusthon,secureosv/pythia,tempbottle/Rusthon,kustomzone/Rusthon,PythonJS/PythonJS,secureosv/pythia,secureosv/pythia,pombredanne/Rusthon,pombredanne/Rusthon,pombredanne/PythonJS,secureosv/pythia,rusthon/Rusthon,tempbottle/Rusthon,chiyama/PythonJS,tempbottle/Rusthon,kustomzone/Rusthon,chiyama/PythonJS,rootfs/Rusthon,tempbottle/Rusthon,PythonJS/PythonJS,kustomzone/Rusthon,rootfs/Rusthon,pombredanne/Rusthon,pombredanne/PythonJS,pombredanne/PythonJS,rusthon/Rusthon,pombredanne/Rusthon,rusthon/Rusthon,chiyama/PythonJS,secureosv/pythia,pombredanne/Rusthon,tempbottle/Rusthon,pombredanne/PythonJS,rootfs/Rusthon