Add default impl of getCanonicalText

#KTIJ-11270

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

@@ -31,7 +31,7 @@ abstract class AbstractKtReference<T : KtElement>(element: T) : PsiPolyVariantRe
     override fun multiResolve(incompleteCode: Boolean): Array<ResolveResult> =
         ResolveCache.getInstance(expression.project).resolveWithCaching(this, resolver, false, incompleteCode)
 
-    override fun getCanonicalText(): String = "<TBD>"
+    override fun getCanonicalText(): String = expression.text
 
     open fun canRename(): Boolean = false
     override fun handleElementRename(newElementName: String): PsiElement? =

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

@@ -56,8 +56,6 @@ abstract class KtSimpleNameReference(expression: KtSimpleNameExpression) : KtSim
     ): PsiElement =
         getKtReferenceMutateService().bindToFqName(this, fqName, shorteningMode, targetElement)
 
-    override fun getCanonicalText(): String = expression.text
-
     override val resolvesByNames: Collection<Name>
         get() {
             val element = element