8287118: Use monospace font for annotation default values

Reviewed-by: hannesw, jjg

Author: liach

src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/AnnotationTypeMemberWriterImpl.java

@@ -270,7 +270,7 @@ public void addDefaultValueInfo(Element member, Content annotationContent) {
             if (value != null) {
                 var dl = HtmlTree.DL(HtmlStyle.notes);
                 dl.add(HtmlTree.DT(contents.default_));
-                dl.add(HtmlTree.DD(Text.of(value.toString())));
+                dl.add(HtmlTree.DD(HtmlTree.CODE(Text.of(value.toString()))));
                 annotationContent.add(dl);
             }
         }

test/langtools/jdk/javadoc/doclet/testAnnotationTypes/TestAnnotationTypes.java

@@ -141,7 +141,7 @@ public void test() {
                     <div class="member-signature"><span class="return-type">java.lang.String</span>&nbsp;<span class="element-name">optional</span></div>
                     <dl class="notes">
                     <dt>Default:</dt>
-                    <dd>""</dd>
+                    <dd><code>""</code></dd>
                     </dl>
                     </section>
                     </li>

test/langtools/jdk/javadoc/doclet/testHtmlDefinitionListTag/TestHtmlDefinitionListTag.java

@@ -113,7 +113,7 @@ void checkCommon(boolean checkC5) {
                 """
                     <dl class="notes">
                     <dt>Default:</dt>
-                    <dd>true</dd>
+                    <dd><code>true</code></dd>
                     </dl>""");
 
         // Test for valid HTML generation which should not comprise of empty