Add escaping test cases.
Add escaping test cases.

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