add code style for logs README

logs/README.md

@@ -16,48 +16,57 @@ As of now this logs support console, file,smtp and conn.
 
 First you must import it
 
+```golang
 import (
 	"github.com/astaxie/beego/logs"
 )
+```
 
 Then init a Log (example with console adapter)
 
+```golang
 log := NewLogger(10000)
 log.SetLogger("console", "")	
+```
 
 > the first params stand for how many channel
 
 Use it like this:
 	
+```golang	
 log.Trace("trace")
 log.Info("info")
 log.Warn("warning")
 log.Debug("debug")
 log.Critical("critical")
-
+```
 
 ## File adapter
 
 Configure file adapter like this:
 	
+```golang	
 log := NewLogger(10000)
 log.SetLogger("file", `{"filename":"test.log"}`)
-
+```
 
 ## Conn adapter
 
 Configure like this:
 
+```golang
 log := NewLogger(1000)
 log.SetLogger("conn", `{"net":"tcp","addr":":7020"}`)
 log.Info("info")
-
+```
 
 ## Smtp adapter
 
 Configure like this:
 
+```golang
 log := NewLogger(10000)
 log.SetLogger("smtp", `{"username":"beegotest@gmail.com","password":"xxxxxxxx","host":"smtp.gmail.com:587","sendTos":["xiemengjun@gmail.com"]}`)
 log.Critical("sendmail critical")
 time.Sleep(time.Second * 30)
+```