correctly implement JetSimpleNameReference.getTextRange() so that it doesn't include the @ character for references in labels

#KT-7560 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/references/JetSimpleNameReference.kt

@@ -61,7 +61,11 @@ public class JetSimpleNameReference(
         return super.isReferenceTo(element)
     }
 
-    override fun getRangeInElement(): TextRange = TextRange(0, getElement().getTextLength())
+    override fun getRangeInElement(): TextRange {
+        val element = getElement().getReferencedNameElement()
+        val startOffset = getElement().getTextRange().getStartOffset()
+        return element.getTextRange().shiftRight(-startOffset)
+    }
 
     override fun canRename(): Boolean {
         if (expression.getParentOfTypeAndBranch<JetWhenConditionInRange>(strict = true){ getOperationReference() } != null) return false

idea/testData/refactoring/rename/inplace/LabelFromFunction.kt

@@ -0,0 +1,5 @@
+fun xyzzy(): Any {
+    fun b<caret>ar(): Int {
+        return@bar 1
+    }
+}

idea/testData/refactoring/rename/inplace/LabelFromFunction.kt.after

@@ -0,0 +1,5 @@
+fun xyzzy(): Any {
+    fun foo(): Int {
+        return@foo 1
+    }
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/InplaceRenameTest.kt

@@ -124,6 +124,10 @@ public class InplaceRenameTest : LightPlatformCodeInsightTestCase() {
         doTestInplaceRename(null)
     }
 
+    public fun testLabelFromFunction() {
+        doTestInplaceRename("foo")
+    }
+
     private fun doTestInplaceRename(newName: String?) {
         configureByFile(getTestName(false) + ".kt")
         val element = TargetElementUtilBase.findTargetElement(