gofix: osopen: fixed=true when changing O_CREAT

R=rsc, r
CC=golang-dev
https://golang.org/cl/4921047

src/cmd/gofix/osopen.go

@@ -31,6 +31,7 @@ func osopen(f *ast.File) bool {
 		// Rename O_CREAT to O_CREATE.
 		if expr, ok := n.(ast.Expr); ok && isPkgDot(expr, "os", "O_CREAT") {
 			expr.(*ast.SelectorExpr).Sel.Name = "O_CREATE"
+			fixed = true
 			return
 		}
 

src/cmd/gofix/osopen_test.go

@@ -54,6 +54,29 @@ func f() {
 	os.OpenFile(a, os.O_SURPRISE|os.O_CREATE, 0666)
 	_ = os.O_CREATE
 }
+`,
+	},
+	{
+		Name: "osopen.1",
+		In: `package main
+
+import (
+	"os"
+)
+
+func f() {
+	_ = os.O_CREAT
+}
+`,
+		Out: `package main
+
+import (
+	"os"
+)
+
+func f() {
+	_ = os.O_CREATE
+}
 `,
 	},
 }