write_element() was writing to stdout.

doc/reference.html

@@ -64,6 +64,8 @@ div.contents ul.contents {
 }
 .members {
 }
+.method {
+}
 .parameters {
 }
 .returnvalue {
@@ -123,7 +125,12 @@ div.body dt {
 div.body dd {
   margin-bottom: 0.5em;
 }
-h1.title, h2.title, h3.title {
+h1.title {
+}
+h2.title {
+  border-bottom: solid 2px black;
+}
+h3.title {
   border-bottom: solid 2px black;
 }
 --></style>

mxmldoc.c

@@ -2667,11 +2667,11 @@ write_element(FILE        *out,		/* I - Output file */
 	   mxmlFindElement(doc, doc, "union", "name", node->value.text.string,
                            MXML_DESCEND)))
       {
-        printf("<a href=\"#");
+        fputs("<a href=\"#", out);
         write_string(out, node->value.text.string, mode);
-	printf("\">");
+	fputs("\">", out);
         write_string(out, node->value.text.string, mode);
-	printf("</a>");
+	fputs("</a>", out);
       }
       else
         write_string(out, node->value.text.string, mode);