Format spaces after annotation in annotated expression

Fixes #KT-12781

idea/formatter/src/org/jetbrains/kotlin/idea/formatter/kotlinSpacingRules.kt

@@ -217,6 +217,8 @@ fun createSpacingBuilder(settings: CodeStyleSettings, builderUtil: KotlinSpacing
             after(LONG_TEMPLATE_ENTRY_START).spaces(0)
             before(LONG_TEMPLATE_ENTRY_END).spaces(0)
 
+            afterInside(ANNOTATION_ENTRY, ANNOTATED_EXPRESSION).spaces(1)
+
             val TYPE_COLON_ELEMENTS = TokenSet.create(PROPERTY, FUN, VALUE_PARAMETER, DESTRUCTURING_DECLARATION_ENTRY, FUNCTION_LITERAL)
             beforeInside(COLON, TYPE_COLON_ELEMENTS) { spaceIf(kotlinSettings.SPACE_BEFORE_TYPE_COLON) }
             afterInside(COLON, TYPE_COLON_ELEMENTS) { spaceIf(kotlinSettings.SPACE_AFTER_TYPE_COLON) }

idea/testData/formatter/AnnotationBeforeExpression.after.kt

@@ -0,0 +1,3 @@
+fun foo() {
+    @Suppress("all") ""
+}

idea/testData/formatter/AnnotationBeforeExpression.kt

@@ -0,0 +1,3 @@
+fun foo() {
+    @Suppress("all")   ""
+}

idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java

@@ -43,6 +43,12 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/formatter"), Pattern.compile("^([^\\.]+)\\.after\\.kt.*$"), true);
         }
 
+        @TestMetadata("AnnotationBeforeExpression.after.kt")
+        public void testAnnotationBeforeExpression() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/AnnotationBeforeExpression.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("AnonymousInitializers.after.kt")
         public void testAnonymousInitializers() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/AnonymousInitializers.after.kt");