doc: go1.8.html review feedback
doc: go1.8.html review feedback

TBR=See https://golang.org/cl/33244

Updates #17929

Change-Id: Ic6d449e7822daa70f3fe17e942e9d29233547019
Reviewed-on: https://go-review.googlesource.com/33759
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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