Some small stylistic tweaks to the vmArguments params

Author: fwcd

adapter/src/main/kotlin/org/javacs/ktda/adapter/KotlinDebugAdapter.kt

@@ -98,15 +98,15 @@ class KotlinDebugAdapter(
 		val mainClass = (args["mainClass"] as? String)
 			?: throw missingRequestArgument("launch", "mainClass")
 
-		val vmArguments:String? = (args["vmArguments"] as? String)
+		val vmArguments = (args["vmArguments"] as? String) ?: ""
 
 		setupCommonInitializationParams(args)
 
 		val config = LaunchConfiguration(
 			debugClassPathResolver(listOf(projectRoot)).classpathOrEmpty,
 			mainClass,
 			projectRoot,
-			vmArguments ?: ""
+			vmArguments
 		)
 		debuggee = launcher.launch(
 			config,

adapter/src/main/kotlin/org/javacs/ktda/jdi/launch/JDILauncher.kt

@@ -83,8 +83,7 @@ class JDILauncher(
 		.collect(Collectors.toSet())
 
 	private fun formatOptions(config: LaunchConfiguration): String {
-		var options = ""
-		options += config.vmArguments
+		var options = config.vmArguments
 		modulePaths?.let { options += " --module-path \"$modulePaths\"" }
 		options += " -classpath \"${formatClasspath(config)}\""
 		return options