[FIR] Complement fir rendering with newly created nodes

compiler/fir/tree/src/org/jetbrains/kotlin/fir/FirRenderer.kt

@@ -1097,6 +1097,22 @@ class FirRenderer(builder: StringBuilder, private val mode: RenderMode = RenderM
         print(")")
     }
 
+    override fun visitAssignmentOperatorStatement(assignmentOperatorStatement: FirAssignmentOperatorStatement) {
+        assignmentOperatorStatement.annotations.renderAnnotations()
+        print(assignmentOperatorStatement.operation.operator)
+        print("(")
+        assignmentOperatorStatement.leftArgument.accept(this@FirRenderer)
+        print(", ")
+        assignmentOperatorStatement.rightArgument.accept(this@FirRenderer)
+        print(")")
+    }
+
+    override fun visitEqualityOperatorCall(equalityOperatorCall: FirEqualityOperatorCall) {
+        equalityOperatorCall.annotations.renderAnnotations()
+        print(equalityOperatorCall.operation.operator)
+        visitCall(equalityOperatorCall)
+    }
+
     override fun visitComponentCall(componentCall: FirComponentCall) {
         visitFunctionCall(componentCall)
     }