test: Update testcase for recvcheck

Co-authored-by: Ludovic Fernandez <[email protected]>

Author: raeperd

pkg/golinters/recvcheck/testdata/recvcheck.go

@@ -1,7 +1,14 @@
 //golangcitest:args -Erecvcheck
 package testdata
 
+import "fmt"
+
 type Bar struct{} // want `the methods of "Bar" use pointer receiver and non-pointer receiver.`
 
-func (b Bar) A()  {}
-func (b *Bar) B() {}
+func (b Bar) A() {
+	fmt.Println("A")
+}
+
+func (b *Bar) B() {
+	fmt.Println("B")
+}