Filename of configMap shows up as env in the Pod - bash

Question

I have a file named config.txt, which i used to create configmap myconfig inside minikube cluster.
However, when I use myconfig in a Pod, the name of the file config.txt also shows up as part of the ENV.
How can I correct it?
> cat config.txt
var3=val3
var4=val4
> kubectl create cm myconfig --from-file=config.txt
configmap/myconfig created
> kubectl describe cm myconfig
Name: myconfig
Namespace: default
Labels: <none>
Annotations: <none>
Data
====
config.txt:
----
var3=val3
var4=val4
Events: <none>
Pod definition
> cat nginx.yml
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: nginx
name: nginx
spec:
containers:
- image: nginx
name: nginx
envFrom:
- configMapRef:
name: myconfig
resources: {}
dnsPolicy: ClusterFirst
restartPolicy: Never
status: {}
> kubectl create -f nginx.yml
pod/nginx created
Pod EVN inspection, notice the line config.txt=var3=val3
expected it to be just var3=val3
> kubectl exec -it nginx -- env
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=nginx
TERM=xterm
config.txt=var3=val3
var4=val4
KUBERNETES_PORT_443_TCP=tcp://10.96.0.1:443
KUBERNETES_PORT_443_TCP_PROTO=tcp
KUBERNETES_PORT_443_TCP_PORT=443
KUBERNETES_PORT_443_TCP_ADDR=10.96.0.1
KUBERNETES_SERVICE_HOST=10.96.0.1
KUBERNETES_SERVICE_PORT=443
KUBERNETES_SERVICE_PORT_HTTPS=443
KUBERNETES_PORT=tcp://10.96.0.1:443
NGINX_VERSION=1.19.4
NJS_VERSION=0.4.4
PKG_RELEASE=1~buster
HOME=/root

Answer 1

Create configmap like this will do the job:
kubectl create cm myconfig --from-env-file=config.txt