KT-11680 Code completion of label for existing return with value inserts redundant whitespace

#KT-11680 Fixed
 #KT-9993 Fixed

idea/idea-completion/testData/handlers/basic/AddLabelToReturn.kt

@@ -0,0 +1,5 @@
+val v: Boolean = run {
+    return<caret> true
+}
+
+// ELEMENT: "return@run"

idea/idea-completion/testData/handlers/basic/AddLabelToReturn.kt.after

@@ -0,0 +1,5 @@
+val v: Boolean = run {
+    return@run <caret>true
+}
+
+// ELEMENT: "return@run"

idea/idea-completion/testData/handlers/basic/ClassKeywordBeforeName.kt

@@ -0,0 +1,4 @@
+cl<caret>interface MyClass
+
+// ELEMENT: "class"
+// CHAR: '\t'

idea/idea-completion/testData/handlers/basic/ClassKeywordBeforeName.kt.after

@@ -0,0 +1,4 @@
+class <caret>MyClass
+
+// ELEMENT: "class"
+// CHAR: '\t'