* Fixed the format of ds18b20 wiki

modules/ds18b20.CN.md

@@ -1,12 +1,13 @@
 #DS18B20 模块
 ##引用
-
+```lua
 ds18b20 = require("ds18b20")
-
+```
 #释放
+```lua
 ds18b20 = nil
 package.loaded["ds18b20"]=nil
-
+```
 ##常量
 C, F, K
 

modules/ds18b20.EN.md

@@ -1,12 +1,13 @@
 #DS18B20 Module
 ##Require
-
+```lua
 ds18b20 = require("ds18b20")
-
+```
 ## Release
+```lua
 ds18b20 = nil
 package.loaded["ds18b20"]=nil
-
+```
 ##Constant
 C, F, K