@@ -216,9 +216,9 @@ func (cli *Client) getAPIPath(p string, query url.Values) string {

 	var apiPath string

 	if cli.version != "" {

 		v := strings.TrimPrefix(cli.version, "v")

-		apiPath = fmt.Sprintf("%s/v%s%s", cli.basePath, v, p)

+		apiPath = cli.basePath + "/v" + v + p

 	} else {

-		apiPath = fmt.Sprintf("%s%s", cli.basePath, p)

+		apiPath = cli.basePath + p

 	}

 	u := &url.URL{

@@ -20,7 +20,7 @@ func (cli *Client) ContainerStatPath(ctx context.Context, containerID, path stri

 	query := url.Values{}

 	query.Set("path", filepath.ToSlash(path)) // Normalize the paths used in the API.

-	urlStr := fmt.Sprintf("/containers/%s/archive", containerID)

+	urlStr := "/containers/" + containerID + "/archive"

 	response, err := cli.head(ctx, urlStr, query, nil)

 	if err != nil {

 		return types.ContainerPathStat{}, err

@@ -42,7 +42,7 @@ func (cli *Client) CopyToContainer(ctx context.Context, container, path string,

 		query.Set("copyUIDGID", "true")

 	}

-	apiPath := fmt.Sprintf("/containers/%s/archive", container)

+	apiPath := "/containers/" + container + "/archive"

 	response, err := cli.putRaw(ctx, apiPath, query, content, nil)

 	if err != nil {

@@ -63,7 +63,7 @@ func (cli *Client) CopyFromContainer(ctx context.Context, container, srcPath str

 	query := make(url.Values, 1)

 	query.Set("path", filepath.ToSlash(srcPath)) // Normalize the paths used in the API.

-	apiPath := fmt.Sprintf("/containers/%s/archive", container)

+	apiPath := "/containers/" + container + "/archive"

 	response, err := cli.get(ctx, apiPath, query, nil)

 	if err != nil {

 		return nil, types.ContainerPathStat{}, err

@@ -1,8 +1,6 @@

 package client

 import (

-	"fmt"

-

 	"github.com/docker/docker/api/types"

 	"golang.org/x/net/context"

 )

@@ -10,7 +8,7 @@ import (

 // Ping pings the server and returns the value of the "Docker-Experimental", "OS-Type" & "API-Version" headers

 func (cli *Client) Ping(ctx context.Context) (types.Ping, error) {

 	var ping types.Ping

-	req, err := cli.buildRequest("GET", fmt.Sprintf("%s/_ping", cli.basePath), nil, nil)

+	req, err := cli.buildRequest("GET", cli.basePath+"/_ping", nil, nil)

 	if err != nil {

 		return ping, err

 	}

@@ -1,7 +1,6 @@

 package client

 import (

-	"fmt"

 	"io"

 	"net/url"

@@ -33,5 +32,5 @@ func (cli *Client) PluginUpgrade(ctx context.Context, name string, options types

 func (cli *Client) tryPluginUpgrade(ctx context.Context, query url.Values, privileges types.PluginPrivileges, name, registryAuth string) (serverResponse, error) {

 	headers := map[string][]string{"X-Registry-Auth": {registryAuth}}

-	return cli.post(ctx, fmt.Sprintf("/plugins/%s/upgrade", name), query, privileges, headers)

+	return cli.post(ctx, "/plugins/"+name+"/upgrade", query, privileges, headers)

 }