net/http: use bullet characters for godoc lists
net/http: use bullet characters for godoc lists

Brad noticed a bullet list was rendered as preformatted text because of
the indentation. One can use a unicode bullet as an ersatz for bullet
lists.

Fixes #20043

Change-Id: Iaed3582d14bd05920455669039a900d7155960d9
Reviewed-on: https://go-review.googlesource.com/41212
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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