fix: improve ClientWithHeader option name

Author: Stebalien

http/client.go

@@ -41,8 +41,8 @@ func ClientWithUserAgent(ua string) ClientOpt {
 	}
 }
 
-// ClientWithHeaders specifies the HTTP header for the client.
-func ClientWithHeaders(key, value string) ClientOpt {
+// ClientWithHeader adds an HTTP header to the client.
+func ClientWithHeader(key, value string) ClientOpt {
 	return func(c *client) {
 		if c.headers == nil {
 			c.headers = map[string]string{}

http/client_test.go

@@ -126,7 +126,7 @@ func TestClientHeader(t *testing.T) {
 		testClient := s.Client()
 		tc.host = s.URL
 		r := &cmds.Request{Path: tc.path, Command: &cmds.Command{}, Root: &cmds.Command{}}
-		c := NewClient(tc.host, ClientWithHeaders(tc.header, tc.value)).(*client)
+		c := NewClient(tc.host, ClientWithHeader(tc.header, tc.value)).(*client)
 		c.httpClient = testClient
 		c.send(r)