You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: env_parse_test.go
    path of file: ./repos/kubernetes/staging/src/k8s.io/kubectl/pkg/cmd/set/env
    
    the code of the file until where you have to start completion: /*
Copyright 2017 The Kubernetes Authors.

Licensed 
    
func ExampleParseEnv_bad_first() {
	var r io.Reader
	bad := []string{"This not in the key=value format."}
	fmt.Println(ParseEnv(bad, r))
	// Output:
	// [] [] false "This not in the key" is not a valid key name: a valid environment variable name must consist of alphabetic characters, digits, '_', '-', or '.', and must not start with a digit (e.g. 'my.env-name',  or 'MY_ENV.NAME',  or 'MyEnvName1', regex used for validation is '[-._a-zA-Z][-._a-zA-Z0-9]*')
}