Update comments: config_file must be specified explicitly (#11318)

* Update comments: config_file must be specified explicitly

* Fix formatting

composer/workflows/kubernetes_pod_operator_c2.py

@@ -64,11 +64,10 @@
  start_date=YESTERDAY,
 ) as dag:
  # Only name, namespace, image, and task_id are required to create a
- # KubernetesPodOperator. In Cloud Composer, currently the operator defaults
- # to using the config file found at `/home/airflow/composer_kube_config if
- # no `config_file` parameter is specified. By default it will contain the
- # credentials for Cloud Composer's Google Kubernetes Engine cluster that is
- # created upon environment creation.
+ # KubernetesPodOperator. In Cloud Composer, the config file found at
+ # `/home/airflow/composer_kube_config` contains credentials for
+ # Cloud Composer's Google Kubernetes Engine cluster that is created
+ # upon environment creation.
  # [START composer_2_kubernetespodoperator_minconfig]
  kubernetes_min_pod = KubernetesPodOperator(
  # The ID specified for the task.
@@ -89,8 +88,7 @@
  # uses has permission to access the Google Container Registry
  # (the default service account has permission)
  image="gcr.io/gcp-runtimes/ubuntu_20_0_4",
- # Specifies path to kubernetes config. If no config is specified will
- # default to '~/.kube/config'. The config_file is templated.
+ # Specifies path to kubernetes config. The config_file is templated.
  config_file="/home/airflow/composer_kube_config",
  # Identifier of connection that should be used
  kubernetes_conn_id="kubernetes_default",
@@ -144,8 +142,7 @@
  "EXAMPLE_VAR": "/example/value",
  "GOOGLE_APPLICATION_CREDENTIALS": "/var/secrets/google/service-account.json",
  },
- # Specifies path to kubernetes config. If no config is specified will
- # default to '~/.kube/config'. The config_file is templated.
+ # Specifies path to kubernetes config. The config_file is templated.
  config_file="/home/airflow/composer_kube_config",
  # Identifier of connection that should be used
  kubernetes_conn_id="kubernetes_default",
@@ -195,8 +192,7 @@
  requests={"cpu": "1000m", "memory": "10G", "ephemeral-storage": "10G"},
  limits={"cpu": "1000m", "memory": "10G", "ephemeral-storage": "10G"},
  ),
- # Specifies path to kubernetes config. If no config is specified will
- # default to '~/.kube/config'. The config_file is templated.
+ # Specifies path to kubernetes config. The config_file is templated.
  config_file="/home/airflow/composer_kube_config",
  # If true, the content of /airflow/xcom/return.json from container will
  # also be pushed to an XCom when the container ends.