fixed minor typos in RFC
fixed minor typos in RFC

I did a first read of the RFC and fixed the typos I found.

iblech/blaze-html,jgm/blaze-html,Soostone/blaze-markup-haste,jgm/blaze-html,FranklinChen/blaze-markup,Soostone/blaze-markup-haste,Soostone/blaze-html-haste,iblech/blaze-html,mikehat/blaze-all,dylex/blaze-markup,mikehat/blaze-all,mikehat/blaze-all,dylex/blaze-markup,jgm/blaze-html,FranklinChen/blaze-markup