Fix Implode signature

Lewiscowles1986 · schlessera · commit a0d79d3ba2dd · 2021-05-10T08:46:23.000+01:00
The following triggered an error locally...

```
return implode( $lines, "\n" );
```

By switching the operands so that glue comes first and collection second. I believe this might help this to work
diff --git a/src/ScaffoldPackageCommand.php b/src/ScaffoldPackageCommand.php
@@ -706,7 +706,7 @@ private static function indent( $whitespace, $text ) {
 		foreach ( $lines as &$line ) {
 			$line = $whitespace . $line;
 		}
-		return implode( $lines, "\n" );
+		return implode( "\n", $lines );
 	}
 
 	private function prompt_if_files_will_be_overwritten( $filename, $force ) {

Original file line number	Diff line number	Diff line change
`@@ -706,7 +706,7 @@ private static function indent( $whitespace, $text ) {`
`706`	`706`	`foreach ( $lines as &$line ) {`
`707`	`707`	`$line = $whitespace . $line;`
`708`	`708`	`}`
`709`		`- return implode( $lines, "\n" );`
	`709`	`+ return implode( "\n", $lines );`
`710`	`710`	`}`
`711`	`711`
`712`	`712`	`private function prompt_if_files_will_be_overwritten( $filename, $force ) {`