Merge pull request #1092 from mileszhang2016/develop

Update condition_grammar.md

Author: mileszhang2016

docs/en_us/condition/condition_grammar.md

@@ -41,7 +41,7 @@ bfe_host = req_host_in("bfe-networks.com")
 
 ```go
 // return true if the value of new_host is true and the request method is GET
-$news_host && req_method_in("GET")
+$new_host && req_method_in("GET")
 ```
 
 ## Grammar