Insert paired brackets: insert space after right brace of nested lambda (KT-28098)

#KT-28098 Fixed

idea/src/org/jetbrains/kotlin/idea/editor/KotlinTypedHandler.java

@@ -116,7 +116,8 @@ public class KotlinTypedHandler extends TypedHandlerDelegate {
 
                 int tokenBeforeBraceOffset = iterator.getStart();
 
-                PsiDocumentManager.getInstance(project).commitDocument(editor.getDocument());
+                Document document = editor.getDocument();
+                PsiDocumentManager.getInstance(project).commitDocument(document);
 
                 PsiElement leaf = file.findElementAt(offset);
                 if (leaf != null) {
@@ -130,6 +131,14 @@ public class KotlinTypedHandler extends TypedHandlerDelegate {
                             return Result.STOP;
                         }
                     }
+                    if (leaf.getText().equals("}")
+                        && parent instanceof KtFunctionLiteral
+                        && document.getLineNumber(offset) == document.getLineNumber(parent.getTextRange().getStartOffset())
+                    ) {
+                        EditorModificationUtil.insertStringAtCaret(editor, "{} ", false, false);
+                        editor.getCaretModel().moveToOffset(offset + 1);
+                        return Result.STOP;
+                    }
                 }
 
                 return Result.CONTINUE;

idea/tests/org/jetbrains/kotlin/idea/editor/TypedHandlerTest.kt

@@ -398,7 +398,13 @@ class TypedHandlerTest : LightCodeInsightTestCase() {
             "    if (some.hello (12) {<caret>})\n" +
             "}"
     )
-
+    
+    fun testInsertSpaceAfterRightBraceOfNestedLambda() = doTypeTest(
+        '{',
+        "val t = Array(100) { Array(200) <caret>}",
+        "val t = Array(100) { Array(200) {<caret>} }"
+    )
+    
     fun testAutoInsertParenInStringLiteral() = doTypeTest(
             '(',
             """fun f() { println("$dollar{f<caret>}") }""",