Fix go vet errors

Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)

Docker-DCO-1.1-Signed-off-by: Victor Vieux <vieux@docker.com> (github: vieux)

pkg/graphdb/graphdb_test.go

@@ -1,13 +1,14 @@
 package graphdb
 
 import (
-	_ "code.google.com/p/gosqlite/sqlite3"
 	"database/sql"
 	"fmt"
 	"os"
 	"path"
 	"strconv"
 	"testing"
+
+	_ "code.google.com/p/gosqlite/sqlite3"
 )
 
 func newTestDb(t *testing.T) (*Database, string) {
@@ -535,6 +536,6 @@ func TestConcurrentWrites(t *testing.T) {
 		}
 	}
 	if any {
-		t.Fatal()
+		t.Fail()
 	}
 }

pkg/mflag/example/example.go

@@ -28,8 +28,8 @@ func main() {
 		flag.PrintDefaults()
 	} else {
 		fmt.Printf("s/#hidden/-string: %s\n", str)
-		fmt.Printf("b: %b\n", b)
-		fmt.Printf("-bool: %b\n", b2)
+		fmt.Printf("b: %t\n", b)
+		fmt.Printf("-bool: %t\n", b2)
 		fmt.Printf("s/#hidden/-string(via lookup): %s\n", flag.Lookup("s").Value.String())
 		fmt.Printf("ARGS: %v\n", flag.Args())
 	}