Fix wrong indentation in lambdas with body

plugins/stream-debugger/src/main/java/com/intellij/debugger/streams/trace/dsl/impl/java/JavaLambda.kt

@@ -29,7 +29,7 @@ class JavaLambda(override val variableName: String, override val body: JavaLambd
 
   private fun JavaLambdaBody.convert(indent: Int): String =
     if (isExpression()) this.toCode(0)
-    else "{" +
+    else "{\n" +
          this.toCode(indent + 1) +
          "}".withIndent(indent)
 }

plugins/stream-debugger/testData/dsl/java/lambdaWithCodeBlock.out

@@ -1,3 +1,4 @@
-y -> {  y.method1();
+y -> {
+  y.method1();
   y.method2();
 };