Questions regarding examples for option --from-file when creating configmaps

General Discussions
1

I am currently getting into Kubernetes.
When creating configmaps is it posible to create a configmap with key-value pairs from inside the file.

As per

$kubectl create cm --help

[...]
  # Create a new configmap named my-config from the key=value pairs in the file
  kubectl create configmap my-config --from-file=path/to/bar

This should be possible in my understanding.

From a file with content

permission:true
reset-counter:4
some-value:string

I expect a config-map such as

data:
  permission: "true"
  reset-counter: "4"
  some-value: "string"
kind: ConfigMap

Instead it creates a config-map with one key (=file-name) and value (=file-content)

How does kubernetes differentiate between the two uses in the examples?

Examples:  
# Create a new configmap named my-config based on folder bar
kubectl create configmap my-config --from-file=path/to/bar        
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                
# Create a new configmap named my-config from the key=value pairs in the file 
kubectl create configmap my-config --from-file=path/to/bar

Thx

Cluster information:

Kubernetes version: v.1.21.1+k3s1
Cloud being used: bare-metal
Installation method: k3s