Corrections after review + one more test added

idea/testData/completion/handlers/basic/DoNotUseParenthesisOnNextLine.kt

@@ -0,0 +1,8 @@
+fun foo(p: Int){}
+
+fun f() {
+    f<caret>
+    (a + b).x()
+}
+
+// ELEMENT: foo

idea/testData/completion/handlers/basic/DoNotUseParenthesisOnNextLine.kt.after

@@ -0,0 +1,8 @@
+fun foo(p: Int){}
+
+fun f() {
+    foo(<caret>)
+    (a + b).x()
+}
+
+// ELEMENT: foo