Use Java 7+ diamond operator in compiler modules

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.java

@@ -95,9 +95,9 @@ public abstract class CommonCompilerArguments implements Serializable {
     @ValueDescription(PLUGIN_OPTION_FORMAT)
     public String[] pluginOptions;
 
-    public List<String> freeArgs = new SmartList<String>();
+    public List<String> freeArgs = new SmartList<>();
 
-    public List<String> unknownExtraFlags = new SmartList<String>();
+    public List<String> unknownExtraFlags = new SmartList<>();
 
     @NotNull
     public static CommonCompilerArguments createDefaultInstance() {

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/messages/GroupingMessageCollector.java

@@ -82,7 +82,7 @@ public class GroupingMessageCollector implements MessageCollector {
 
     @NotNull
     private Collection<String> sortedKeys() {
-        List<String> sortedKeys = new ArrayList<String>(groupedMessages.keySet());
+        List<String> sortedKeys = new ArrayList<>(groupedMessages.keySet());
         // ensure that messages with no location i.e. perf, incomplete hierarchy are always reported first
         sortedKeys.sort((o1, o2) -> {
             if (o1 == o2) return 0;

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/modules/ModuleXmlParser.java

@@ -75,7 +75,7 @@ public class ModuleXmlParser {
     }
 
     private final MessageCollector messageCollector;
-    private final List<Module> modules = new SmartList<Module>();
+    private final List<Module> modules = new SmartList<>();
     private DefaultHandler currentState;
 
     private ModuleXmlParser(@NotNull MessageCollector messageCollector) {