Fix imports for gopkg.in/stack.v0

Author: ChrisHines

format_test.go

@@ -3,14 +3,14 @@ package stack_test
 import (
 	"fmt"
 
-	"github.com/go-stack/stack"
+	"gopkg.in/stack.v0"
 )
 
 func Example_callFormat() {
 	log("%+s")
 	log("%v   %[1]n()")
 	// Output:
-	// github.com/go-stack/stack/format_test.go
+	// gopkg.in/stack.v0/format_test.go
 	// format_test.go:11   Example_callFormat()
 }
 

stack.go

@@ -7,7 +7,7 @@
 // Package stack's types implement fmt.Formatter, which provides a simple and
 // flexible way to declaratively configure formatting when used with logging
 // or error tracking packages.
-package stack
+package stack // import "gopkg.in/stack.v0"
 
 import (
 	"fmt"

stack_test.go

@@ -9,7 +9,7 @@ import (
 	"runtime"
 	"testing"
 
-	"github.com/go-stack/stack"
+	"gopkg.in/stack.v0"
 )
 
 type testType struct{}