Use after line end inlays to avoid moving inlay on the next line pressing enter

^KT-29534 Fixed

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/output/InlayScratchOutputHandler.kt

@@ -74,16 +74,15 @@ object InlayScratchOutputHandler : ScratchOutputHandler {
                 if (shortText != text) {
                     printToToolWindow(file, expression, output)
                 }
-                editor.inlayModel.addInlineElement(
+                editor.inlayModel.addInlay(
                     lineEndOffset,
-                    true,
                     InlayScratchFileRenderer(" ".repeat(spaceCount) + shortText, output.type)
                 )
             }
 
             val existing = editor.inlayModel
-                .getInlineElementsInRange(lineEndOffset, lineEndOffset)
-                .singleOrNull { it.renderer is InlayScratchFileRenderer }
+                .getInlays(lineEndOffset, lineEndOffset)
+                .singleOrNull()
             if (existing != null) {
                 existing.dispose()
                 addInlay(((existing.renderer as InlayScratchFileRenderer).text + "; " + output.text).drop(spaceCount))
@@ -110,8 +109,7 @@ object InlayScratchOutputHandler : ScratchOutputHandler {
     private fun clearInlays(editor: TextEditor) {
         UIUtil.invokeLaterIfNeeded {
             editor
-                .editor.inlayModel.getInlineElementsInRange(0, editor.editor.document.textLength)
-                .filter { it.renderer is InlayScratchFileRenderer }
+                .editor.inlayModel.getInlays(0, editor.editor.document.textLength)
                 .forEach { Disposer.dispose(it) }
         }
     }

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/output/inlayHelper.kt

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+@file:Suppress("UnstableApiUsage")
+
+package org.jetbrains.kotlin.idea.scratch.output
+
+import com.intellij.openapi.editor.InlayModel
+
+fun InlayModel.addInlay(offset: Int, renderer: InlayScratchFileRenderer) {
+    addAfterLineEndElement(offset, false, renderer)
+}
+
+fun InlayModel.getInlays(start: Int, end: Int) =
+    getAfterLineEndElementsInRange(start, end).filter { it.renderer is InlayScratchFileRenderer }

idea/idea-jvm/src/org/jetbrains/kotlin/idea/scratch/output/inlayHelper.kt.as33

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+@file:Suppress("UnstableApiUsage")
+
+package org.jetbrains.kotlin.idea.scratch.output
+
+import com.intellij.openapi.editor.InlayModel
+
+fun InlayModel.addInlay(offset: Int, renderer: InlayScratchFileRenderer) {
+    addInlineElement(offset, true, renderer)
+}
+
+fun InlayModel.getInlays(start: Int, end: Int) =
+    getInlineElementsInRange(start, end).filter { it.renderer is InlayScratchFileRenderer }

idea/tests/org/jetbrains/kotlin/idea/scratch/AbstractScratchRunActionTest.kt

@@ -28,6 +28,7 @@ import org.jetbrains.kotlin.idea.scratch.actions.ClearScratchAction
 import org.jetbrains.kotlin.idea.scratch.actions.RunScratchAction
 import org.jetbrains.kotlin.idea.scratch.actions.ScratchCompilationSupport
 import org.jetbrains.kotlin.idea.scratch.output.InlayScratchFileRenderer
+import org.jetbrains.kotlin.idea.scratch.output.getInlays
 import org.jetbrains.kotlin.idea.scratch.ui.ScratchTopPanel
 import org.jetbrains.kotlin.idea.test.KotlinLightProjectDescriptor
 import org.jetbrains.kotlin.idea.test.KotlinWithJdkAndRuntimeLightProjectDescriptor
@@ -135,10 +136,8 @@ abstract class AbstractScratchRunActionTest : FileEditorManagerTestCase() {
     }
 
     protected fun getInlays(start: Int = 0, end: Int = myFixture.file.textLength): List<InlayScratchFileRenderer> {
-        val inlineElementsInRange = myFixture.editor.inlayModel.getInlineElementsInRange(start, end)
-        return inlineElementsInRange
-            .map { it.renderer }
-            .filterIsInstance<InlayScratchFileRenderer>()
+        val inlineElementsInRange = myFixture.editor.inlayModel.getInlays(start, end)
+        return inlineElementsInRange.map { it.renderer as InlayScratchFileRenderer }
     }
 
     private fun configureOptions(