src/java.desktop/share/classes/javax/swing/plaf/basic/BasicFileChooserUI.java

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rev 10525 : 8038277: Improve the bootstrap performance of cacerts keystore (client)
Contributed-by: Otavio Santana <otaviojava@java.net>

@@ -1328,12 +1328,12 @@
 
             htmlBuf.append("<html>\n<body>\n<ul>\n");
 
             for (Object obj : values) {
                 String val = ((obj == null) ? "" : obj.toString());
-                plainBuf.append(val + "\n");
-                htmlBuf.append("  <li>" + val + "\n");
+                plainBuf.append(val).append('\n');
+                htmlBuf.append("  <li>").append(val).append('\n');
             }
 
             // remove the last newline
             plainBuf.deleteCharAt(plainBuf.length() - 1);
             htmlBuf.append("</ul>\n</body>\n</html>");