Do not suggest adding 'name =' before single vararg argument

This fixes two named argument intention tests

idea/src/org/jetbrains/kotlin/idea/intentions/AddNameToArgumentIntention.kt

@@ -19,9 +19,11 @@ package org.jetbrains.kotlin.idea.intentions
 import com.intellij.codeInsight.intention.LowPriorityAction
 import com.intellij.openapi.editor.Editor
 import com.intellij.psi.PsiElement
+import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.idea.caches.resolve.resolveToCall
 import org.jetbrains.kotlin.idea.conversion.copy.end
 import org.jetbrains.kotlin.idea.conversion.copy.start
+import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.calls.model.ArgumentMatch
@@ -71,6 +73,10 @@ class AddNameToArgumentIntention
         if (argumentMatch.valueParameter.varargElementType != null) {
             val varargArgument = resolvedCall.valueArguments[argumentMatch.valueParameter] as? VarargValueArgument ?: return null
             if (varargArgument.arguments.size != 1) return null
+            val versionSettings = callExpr.languageVersionSettings
+            if (versionSettings.supportsFeature(LanguageFeature.ProhibitAssigningSingleElementsToVarargsInNamedForm)) {
+                if (argument.getSpreadElement() == null) return null
+            }
         }
 
         return argumentMatch.valueParameter.name

idea/src/org/jetbrains/kotlin/idea/intentions/AddNamesToCallArgumentsIntention.kt

@@ -18,7 +18,9 @@ package org.jetbrains.kotlin.idea.intentions
 
 import com.intellij.openapi.editor.Editor
 import com.intellij.openapi.util.TextRange
+import org.jetbrains.kotlin.config.LanguageFeature
 import org.jetbrains.kotlin.idea.caches.resolve.resolveToCall
+import org.jetbrains.kotlin.idea.project.languageVersionSettings
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.calls.model.ArgumentMatch
 import org.jetbrains.kotlin.resolve.calls.model.ArgumentMatchStatus
@@ -42,6 +44,10 @@ class AddNamesToCallArgumentsIntention : SelfTargetingRangeIntention<KtCallEleme
             if (argumentMatch.valueParameter.varargElementType != null) {
                 val varargArgument = resolvedCall.valueArguments[argumentMatch.valueParameter] as? VarargValueArgument ?: return null
                 if (varargArgument.arguments.size != 1) return null
+                val versionSettings = element.languageVersionSettings
+                if (versionSettings.supportsFeature(LanguageFeature.ProhibitAssigningSingleElementsToVarargsInNamedForm)) {
+                    if (argument.getSpreadElement() == null) return null
+                }
             }
         }
 

idea/testData/intentions/addNameToArgument/vararg1.kt

@@ -1,3 +1,5 @@
+// IS_APPLICABLE: false
+
 fun foo(vararg s: String){}
 
 fun bar() {

idea/testData/intentions/addNameToArgument/vararg1.kt.after

@@ -1,5 +0,0 @@
-fun foo(vararg s: String){}
-
-fun bar() {
-    foo(s = ""<caret>)
-}

idea/testData/intentions/addNamesToCallArguments/varargSingle.kt

@@ -1,3 +1,5 @@
+// IS_APPLICABLE: false
+
 fun foo(n: Int, vararg s: String){}
 
 fun bar() {

idea/testData/intentions/addNamesToCallArguments/varargSingle.kt.after

@@ -1,5 +0,0 @@
-fun foo(n: Int, vararg s: String){}
-
-fun bar() {
-    <caret>foo(n = 1, s = "")
-}