Merge pull request #1 from tcyrus/patch-1

Update README.md
diff --git a/README.md b/README.md
index 5411a8a..943fac5 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 
 Set up a 'print' subcommand:
 
-```
+```go
 import (
   "flag"
   "fmt"
@@ -51,7 +51,7 @@
 Register using the default Commander, also use some built in subcommands,
 finally run Execute using ExitStatus as the exit code:
 
-```
+```go
 func main() {
   subcommands.Register(subcommands.HelpCommand(), "")
   subcommands.Register(subcommands.FlagsCommand(), "")