Smart completion: lambda item uses template to allow change parameter names

idea/testData/completion/handlers/smart/LambdaInsertImport.kt

@@ -0,0 +1,8 @@
+fun foo(p: (java.util.Date) -> Unit){}
+fun foo(p: (String) -> Unit){}
+
+fun bar() {
+    foo(<caret>)
+}
+
+// ELEMENT: "{ (Date) -> ... }"

idea/testData/completion/handlers/smart/LambdaInsertImport.kt.after

@@ -0,0 +1,10 @@
+import java.util.Date
+
+fun foo(p: (java.util.Date) -> Unit){}
+fun foo(p: (String) -> Unit){}
+
+fun bar() {
+    foo({ (date: Date) -> <caret> })
+}
+
+// ELEMENT: "{ (Date) -> ... }"

idea/testData/completion/smart/Lambda4.kt

@@ -6,5 +6,5 @@ fun bar() {
 }
 
 // ABSENT: "{...}"
-// EXIST: "{ String -> ... }"
-// EXIST: "{ Int -> ... }"
+// EXIST: "{ (String) -> ... }"
+// EXIST: "{ (Int) -> ... }"