Jenkins JUnit Attachments Bug Reproduction Test (404 error with '%' character)

AttachmentsTest.java

package com.example.miyata;

import static org.junit.Assert.fail;

import java.io.File;
import java.net.URL;

import org.apache.commons.io.FileUtils;
import org.junit.Test;

public class AttachmentsTest
{
    @Test
    public void testScreenshot() throws Exception
    {
        File outputDirectory = new File( "target/attachments",
                getClass().getName() );
        FileUtils.forceMkdir( outputDirectory );
        File screenFile = new File( outputDirectory, "100%.png" );
        FileUtils.copyURLToFile(
                new URL( "https://wiki.jenkins-ci.org/download/attachments/2916393/logo.png?version=1&modificationDate=1302753947000" ),
                screenFile );
        System.err.println("[[ATTACHMENT|" + screenFile.getAbsolutePath() + "]]");
        fail();
    }
}