Make multiple imports consistent with import ( ... ) style

Fixes #272

examples/base64-encoding/base64-encoding.go

@@ -6,8 +6,10 @@ package main
 // This syntax imports the `encoding/base64` package with
 // the `b64` name instead of the default `base64`. It'll
 // save us some space below.
-import b64 "encoding/base64"
-import "fmt"
+import (
+	b64 "encoding/base64"
+	"fmt"
+)
 
 func main() {
 

examples/base64-encoding/base64-encoding.hash

@@ -1,2 +1,2 @@
-c20da14820b656c867790f2e99bc37140babca8c
-y_QTcqdkvZh
+e0148b9b4acb01e849b8f678cba03f549d250c44
+V3oV1bvh94k