support multi-line code blocks.

bridge/telegram/handlers.go

@@ -10,6 +10,7 @@ import (
 	"github.com/42wim/matterbridge/bridge/config"
 	"github.com/42wim/matterbridge/bridge/helper"
 	tgbotapi "github.com/go-telegram-bot-api/telegram-bot-api"
+	"fmt"
 )
 
 func (b *Btelegram) handleUpdate(rmsg *config.Message, message, posted, edited *tgbotapi.Message) *tgbotapi.Message {
@@ -455,5 +456,9 @@ func (b *Btelegram) handleEntities(rmsg *config.Message, message *tgbotapi.Messa
 		if e.Type == "code" {
 			rmsg.Text = "`" + rmsg.Text + "`" 			
 		}
+
+		if e.Type == "pre" {
+			rmsg.Text = "```\n" + rmsg.Text + "\n```" 
+		}
 	}
 }