Mini-update: change placeholder

templates/index.html

@@ -56,7 +56,7 @@
                             <option value="quick">Quick Search (only title & scope)</option>
                             <option value="deep">Deep Search</option>
                         </select>
-                        <input type="text" id="keywords" placeholder="Enter your keywords separated by space">
+                        <input type="text" id="keywords" placeholder="Enter your keywords separated by comma">
                         <button id="keyword-search-btn" class="btn">Search</button>
                     </div>
                     <div class="filter-tab-container">