net/http: fix a nit
net/http: fix a nit

Change-Id: I31fa5f906ad2e8dc475dbbeb91f568f91e16861b
Reviewed-on: https://go-review.googlesource.com/35514
Run-TryBot: Mikio Hara <e2f4d2eec1d9a1f781345cdd7260d7d52e6468ae@gmail.com>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

golang/go,codestation/go,josharian/go,golang/go,Cofyc/go,Cofyc/go,vsekhar/elastic-go,golang/go,codestation/go,linux-on-ibm-z/go,linux-on-ibm-z/go,cloudflare/go,josharian/go,nawawi/go,vsekhar/elastic-go,josharian/go,christopher-henderson/Go,vsekhar/elastic-go,akutz/go,golang/go,Cofyc/go,derekmarcotte/go,CAFxX/go,golang/go,cloudflare/go,ImJasonH/go,akutz/go,ImJasonH/go,josharian/go,polyverse-security/go,vsekhar/elastic-go,linux-on-ibm-z/go,vsekhar/elastic-go,CAFxX/go,ImJasonH/go,CAFxX/go,derekmarcotte/go,vsekhar/elastic-go,akutz/go,ImJasonH/go,cloudflare/go,polyverse-security/go,akutz/go,cloudflare/go,derekmarcotte/go,ImJasonH/go,derekmarcotte/go,akutz/go,nawawi/go,linux-on-ibm-z/go,codestation/go,codestation/go,CAFxX/go,akutz/go,codestation/go,golang/go,nawawi/go,linux-on-ibm-z/go,nawawi/go,nawawi/go,nawawi/go,Cofyc/go,CAFxX/go,josharian/go,josharian/go,derekmarcotte/go,polyverse-security/go,codestation/go,cloudflare/go,cloudflare/go,Cofyc/go,nawawi/go,Cofyc/go,linux-on-ibm-z/go,ImJasonH/go,derekmarcotte/go,CAFxX/go,golang/go,josharian/go,linux-on-ibm-z/go,josharian/go,linux-on-ibm-z/go,akutz/go,polyverse-security/go,golang/go,cloudflare/go,polyverse-security/go,vsekhar/elastic-go,CAFxX/go,akutz/go,polyverse-security/go,Cofyc/go,cloudflare/go,CAFxX/go,polyverse-security/go,nawawi/go,derekmarcotte/go,ImJasonH/go,Cofyc/go,codestation/go,codestation/go,ImJasonH/go,vsekhar/elastic-go,derekmarcotte/go,polyverse-security/go