NonInteractiveShellRunner cause command parse failed

[yumc1991]

• Version: SpringShell 3.3.1

• Desc:
  I use nonInteractive mode, but find the default runner may change my origin command and concat """ to my command, which may cause command parse failed.

I don't know why the runner need to do this, and I fix it by using String raw = String.join(" ", args); instead.

[corneil]

Shouldn't it be return Collections.singletonList(this.primaryCommand);?

I would suggest you paste code sample in a block with starting with
```java
void somecode() {
}
// and close with
```

[yumc1991]

Cause my project is in Citrix, I can not copy my code directly.

Here are the code snippets.

The Origin code is below:

// origin code, which may cause command parse failed
String raw = (String) Arrays.stream(args).map((a) -> {
    return !isQuoted(a) && StringUtils.containsWhitespace(a) ? "\"" + a "\"" : a;
 }).collect(Collectors.joining(" "));

The fixed version is below:

// fixed version
String raw = String.join(" ", args);

By doing this, my command in noninteractive like java -jar xxx-spring-shell.jar -c "get -s set -k key" can execute correctly.