cmd/compile: fix comments in transformclosure
cmd/compile: fix comments in transformclosure

Change-Id: I7a18798180405504dc064424d63dac49634168fb
Reviewed-on: https://go-review.googlesource.com/41530
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>

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