Airflow v2.0b3
 Kubernetes v1.19.3

Discovered issue while testing KubernetesPodOperator (haven't tested with other operator).
If I create a multiline string using """ """", add some variables inside (Jinja templating), then use this string as an argument to KubernetesPodOperator:
- In Graph View DAG is not visible (just gray area where it should be a digraph);
- in browser's web console i see the following error:

`Uncaught TypeError: node is undefined
    preProcessGraph http://localhost:8080/static/dist/dagre-d3.min.js:103
    preProcessGraph http://localhost:8080/static/dist/dagre-d3.min.js:103
    fn http://localhost:8080/static/dist/dagre-d3.min.js:103
    call http://localhost:8080/static/dist/d3.min.js:3
    draw http://localhost:8080/graph?dag_id=mydag&execution_date=mydate
    expand_group http://localhost:8080/graph?dag_id=mydag&execution_date=mydate
    <anonymous> http://localhost:8080/graph?dag_id=mydag&execution_date=mydate`

Tree view works without issues in this case. The DAG succeeds.
airflow/models/baseoperator.py
from airflow.models.dag import DAG
        self.subdag: Optional[DAG] = None
        self._log = logging.getLogger("airflow.task.operators")
        
        self.inlets: List = []
        self.outlets: List = []
        self._inlets: List = []
        self._outlets: List = []
        if inlets:
            self._inlets = (
                inlets
                if isinstance(inlets, list)
                else [
                    inlets,
                ]
            )
        if outlets:
            self._outlets = (
                outlets
                if isinstance(outlets, list)
                else [
                    outlets,
                ]
            )
    def __eq__(self, other):
        if type(self) is type(other) and self.task_id == other.task_id:
            return all(self.__dict__.get(c, None) == other.__dict__.get(c, None) for c in self._comps)
        return False
    def __ne__(self, other):