Replace <code> with {@code} in javadoc

{@code foo} is shorter and easier to read and write than
<code>foo</code>, which is why it was introduced years ago in the
javadoc processor.  Make consistent use of it throughout the
documentation comments.

Change-Id: I59d428cb6c5015453629398b0697891b83c8e91d

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/safehtml/client/HighlightSuggestOracle.java

@@ -24,7 +24,7 @@ import java.util.ArrayList;
  * Suggestions supplied by the implementation of
  * {@link #onRequestSuggestions(Request, Callback)} are modified to wrap all
  * occurrences of the {@link SuggestOracle.Request#getQuery()} substring in HTML
- * <code>&lt;strong&gt;</code> tags, so they can be emphasized to the user.
+ * {@code &lt;strong&gt;} tags, so they can be emphasized to the user.
  */
 public abstract class HighlightSuggestOracle extends SuggestOracle {
   private static String escape(String ds) {

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/safehtml/client/LinkFindReplace.java

@@ -49,7 +49,7 @@ public class LinkFindReplace implements FindReplace {
   /**
    * @param find regular expression pattern to match substrings with.
    * @param link replacement link href. Capture groups within
-   *        <code>find</code> can be referenced with <code>$<i>n</i></code>.
+   *        {@code find} can be referenced with {@code $<i>n</i>}.
    */
   public LinkFindReplace(String find, String link) {
     this.pat = RegExp.compile(find);

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/safehtml/client/RawFindReplace.java

@@ -31,7 +31,7 @@ public class RawFindReplace implements FindReplace {
   /**
    * @param find regular expression pattern to match substrings with.
    * @param replace replacement expression. Capture groups within
-   *        <code>find</code> can be referenced with <code>$<i>n</i></code>.
+   *        {@code find} can be referenced with {@code $<i>n</i>}.
    */
   public RawFindReplace(String find, String replace) {
     this.pat = RegExp.compile(find);

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/safehtml/client/SafeHtml.java

@@ -213,7 +213,7 @@ public abstract class SafeHtml
   }
 
   /**
-   * Replace first occurrence of <code>regex</code> with <code>repl</code> .
+   * Replace first occurrence of {@code regex} with {@code repl} .
    * <p>
    * <b>WARNING:</b> This replacement is being performed against an otherwise
    * safe HTML string. The caller must ensure that the replacement does not
@@ -221,7 +221,7 @@ public abstract class SafeHtml
    *
    * @param regex regular expression pattern to match the substring with.
    * @param repl replacement expression. Capture groups within
-   *        <code>regex</code> can be referenced with <code>$<i>n</i></code>.
+   *        {@code regex} can be referenced with {@code $<i>n</i>}.
    * @return a new string, after the replacement has been made.
    */
   public SafeHtml replaceFirst(final String regex, final String repl) {
@@ -229,7 +229,7 @@ public abstract class SafeHtml
   }
 
   /**
-   * Replace each occurrence of <code>regex</code> with <code>repl</code> .
+   * Replace each occurrence of {@code regex} with {@code repl} .
    * <p>
    * <b>WARNING:</b> This replacement is being performed against an otherwise
    * safe HTML string. The caller must ensure that the replacement does not
@@ -237,7 +237,7 @@ public abstract class SafeHtml
    *
    * @param regex regular expression pattern to match substrings with.
    * @param repl replacement expression. Capture groups within
-   *        <code>regex</code> can be referenced with <code>$<i>n</i></code>.
+   *        {@code regex} can be referenced with {@code $<i>n</i>}.
    * @return a new string, after the replacements have been made.
    */
   public SafeHtml replaceAll(final String regex, final String repl) {

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/safehtml/client/SafeHtmlBuilder.java

@@ -165,8 +165,8 @@ public class SafeHtmlBuilder extends SafeHtml {
    * Open an element, appending "<tagName>" to the buffer.
    * <p>
    * After the element is open the attributes may be manipulated until the next
-   * <code>append</code>, <code>openElement</code>, <code>closeSelf</code> or
-   * <code>closeElement</code> call.
+   * {@code append}, {@code openElement}, {@code closeSelf} or
+   * {@code closeElement} call.
    *
    * @param tagName name of the HTML element to open.
    */

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/server/CacheControlFilter.java

@@ -35,7 +35,7 @@ import javax.servlet.http.HttpServletResponse;
  * URL changes, so user agents would request a different resource. We force
  * these resources to have very long expiration times.
  * <p>
- * To use, add the following block to your <code>web.xml</code>:
+ * To use, add the following block to your {@code web.xml}:
  *
  * <pre>
  * &lt;filter&gt;

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/user/client/View.java

@@ -20,12 +20,12 @@ import com.google.gwt.user.client.ui.Widget;
 /**
  * Widget to display within a {@link ViewSite}.
  *<p>
- * Implementations must override <code>protected void onLoad()</code> and
+ * Implementations must override {@code protected void onLoad()} and
  * arrange for {@link #display()} to be invoked once the DOM within the view is
  * consistent for presentation to the user. Typically this means that the
- * subclass can start RPCs within <code>onLoad()</code> and then invoke
- * <code>display()</code> from within the AsyncCallback's
- * <code>onSuccess(Object)</code> method.
+ * subclass can start RPCs within {@code onLoad()} and then invoke
+ * {@code display()} from within the AsyncCallback's
+ * {@code onSuccess(Object)} method.
  */
 public abstract class View extends Composite {
   ViewSite<? extends View> site;

gerrit-gwtexpui/src/main/java/com/google/gwtexpui/user/client/ViewSite.java

@@ -22,7 +22,7 @@ import com.google.gwt.user.client.ui.SimplePanel;
  * Hosts a single {@link View}.
  * <p>
  * View instances are attached inside of an invisible DOM node, permitting their
- * <code>onLoad()</code> method to be invoked and to update the DOM prior to the
+ * {@code onLoad()} method to be invoked and to update the DOM prior to the
  * elements being made visible in the UI.
  * <p>
  * Complaint View instances must invoke {@link View#display()} once the DOM is
@@ -48,7 +48,7 @@ public class ViewSite<V extends View> extends Composite {
    * Set the next view to display.
    * <p>
    * The view will be attached to the DOM tree within a hidden container,
-   * permitting its <code>onLoad()</code> method to execute and update the DOM
+   * permitting its {@code onLoad()} method to execute and update the DOM
    * without the user seeing the result.
    *
    * @param view the next view to display.