add search help text for #category-slug filter

config/locales/server.en.yml

@@ -2784,7 +2784,7 @@ en:
         <table>
         <tr><td><code>order:views</code></td><td><code>order:latest</code></td><td><code>order:likes</code><td></td><td colspan=2></td></tr>
         <tr><td><code>status:open</code></td><td><code>status:closed</code></td><td><code>status:archived</code></td><td><code>status:noreplies</code></td><td><code>status:single_user</code></td></tr>
-        <tr><td><code>category:foo</code></td><td><code>user:foo</code></td><td><code>group:foo</code></td><td><code>badge:foo</code></td><td></td></tr>
+        <tr><td><code>#category-slug</code></td><td><code>category:foo</code></td><td><code>user:foo</code></td><td><code>group:foo</code></td><td><code>badge:foo</code></td><td></td></tr>
         <tr><td><code>in:likes</code></td><td><code>in:posted</code></td><td><code>in:watching</code></td><td><code>in:tracking</code></td><td><code>in:private</code></td></tr>
         <tr><td><code>in:bookmarks</code></td><td><code>in:first</code></td><td><code>in:pinned</code></td><td><code>in:unpinned</code></td><td></td></tr>
         <tr><td><code>posts_count:num</code></td><td><code>before:days or date</code></td><td><code>after:days or date</code></td> <td colspan=2></td></tr>
@@ -2793,6 +2793,7 @@ en:
       <h3>Examples</h3>
       <p>
         <ul>
+          <li><code>rainbows #parks</code> will search for topics containing the word "rainbows" in the category "parks".</li>
           <li><code>rainbows category:parks status:open order:latest</code> will search for topics containing the word "rainbows" in the category "parks" that are not closed or archived, ordered by date of last post.</li>
           <li><code>rainbows category:"parks and gardens" in:bookmarks</code> will search for topics containing the word "rainbows" in the category "parks and gardens" that are bookmarked by you.</li>
         </ul>