Update error messages for org labels + add missing assertion in test

Author: kemzeb

routers/web/org/org_labels.go

@@ -53,7 +53,7 @@ func NewLabel(ctx *context.Context) {
 	}
 	if err := issues_model.NewLabel(ctx, l); err != nil {
 		if label.IsErrInvalidLabelColor(err) {
-			ctx.Flash.Error(err.Error())
+			ctx.Flash.Error("NewLabel: " + err.Error())
 		} else {
 			ctx.ServerError("NewLabel", err)
 			return
@@ -85,7 +85,7 @@ func UpdateLabel(ctx *context.Context) {
 	l.SetArchived(form.IsArchived)
 	if err := issues_model.UpdateLabel(ctx, l); err != nil {
 		if label.IsErrInvalidLabelColor(err) {
-			ctx.Flash.Error(err.Error())
+			ctx.Flash.Error("UpdateLabel: " + err.Error())
 		} else {
 			ctx.ServerError("UpdateLabel", err)
 			return

routers/web/repo/issue_label_test.go

@@ -103,6 +103,7 @@ func TestNewLabelGivenInvalidLabelCode(t *testing.T) {
 	})
 	NewLabel(ctx)
 	assert.Equal(t, http.StatusSeeOther, ctx.Resp.WrittenStatus())
+	assert.Equal(t, "/user2/repo1/labels", test.RedirectURL(ctx.Resp))
 	assert.True(t, ctx.Flash.Has("error"))
 	unittest.AssertNotExistsBean(t, &issues_model.Label{
 		Name: "newlabel",