main: fix unnecessary fmt.Errorf and assign to http.Request pointer

[zchee]

Fix unnecessary fmt.Errorf and assign to http.Request pointer.

[sethvargo]

Hi @zchee

Thank you for the PR. I believe we do need to assign to the pointer to make the context available on the original request. Also, I'm not sure I see the value of using errors.New over fmt.Errorf. The fmt package is already imported, and switching between errors.New and fmt.Errorf when one might need to add formatting is unnecessary devex overhead for no real performance benefit in this project.

[zchee]

@sethvargo Okay, should close it. Thanks for polite reply :D