PDFBOX-5660: avoid default encoding

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1927214 13f79535-47bb-0310-9956-ffa450edef68

Author: THausherr

examples/src/test/java/org/apache/pdfbox/examples/pdmodel/TestEmbeddedFiles.java

@@ -18,6 +18,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 
@@ -48,7 +49,7 @@ void testEmbeddedFiles() throws IOException
         EmbeddedFiles.main(args);
         ExtractEmbeddedFiles.main(args);
         byte[] bytes = Files.readAllBytes(Paths.get(embeddedFile));
-        String content = new String(bytes);
+        String content = new String(bytes, StandardCharsets.US_ASCII);
         Assertions.assertEquals("This is the contents of the embedded file", content);
         new File(embeddedFile).delete();
         new File(outputFile).delete();