Keyword completion: do not add braces after 'companion object' (KT-27915)

^KT-27915 Fixed

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/KeywordCompletion.kt

@@ -72,8 +72,7 @@ object KeywordCompletion {
             FINALLY_KEYWORD to "fun foo() { try {\n}\nfinally{\ncaret\n}",
             DO_KEYWORD to "fun foo() { do {\ncaret\n}",
             INIT_KEYWORD to "class C { init {\ncaret\n}",
-            CONSTRUCTOR_KEYWORD to "class C { constructor(caret)",
-            COMPANION_KEYWORD to "class C { companion object {\ncaret\n}"
+            CONSTRUCTOR_KEYWORD to "class C { constructor(caret)"
     )
 
     private val NO_SPACE_AFTER = listOf(THIS_KEYWORD,

idea/idea-completion/testData/handlers/keywords/CompanionObject.kt.after

@@ -1,5 +1,3 @@
 class C {
-    companion object {
-        <caret>
-    }
+    companion object<caret>
 }

idea/idea-completion/testData/keywords/AfterClassProperty.kt

@@ -29,7 +29,7 @@ class MouseMovedEventArgs
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/AfterFuns.kt

@@ -28,7 +28,7 @@ class A {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/CompanionObjectBeforeObject.kt

@@ -3,4 +3,4 @@ class TestClass {
     object O {}
 }
 
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST: companion object

idea/idea-completion/testData/keywords/InClassBeforeFun.kt

@@ -26,7 +26,7 @@ public class Test {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/InClassScope.kt

@@ -20,7 +20,7 @@ class TestClass {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST:  { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/InEnumScope2.kt

@@ -14,7 +14,7 @@ enum class Test {
 // EXIST:  private
 // EXIST:  protected
 // EXIST:  public
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/InInterfaceScope.kt

@@ -16,7 +16,7 @@ interface Test {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/PropertyAccessors.kt

@@ -28,7 +28,7 @@ class Some {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/PropertyAccessors2.kt

@@ -28,7 +28,7 @@ class Some {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class

idea/idea-completion/testData/keywords/PropertySetter.kt

@@ -26,7 +26,7 @@ class Some {
 // EXIST:  var
 // EXIST:  constructor
 // EXIST:  init
-// EXIST: { itemText: "companion object", tailText: " {...}" }
+// EXIST:  companion object
 // EXIST:  operator
 // EXIST:  infix
 // EXIST:  sealed class