Minor cleanup of HTML5 files in org.eclipse.platform.doc.user

Contributes to
#3275

Author: ptziegler

eclipse.platform.common/bundles/org.eclipse.platform.doc.isv/guide/compare_contentviewer.htm

@@ -111,7 +111,7 @@ <h3>Content Merge Viewers</h3>
 <a href="../reference/api/org/eclipse/compare/contentmergeviewer/IMergeViewerContentProvider.html"><b>IMergeViewerContentProvider</b></a> interface.</p>
 
 
-<h4><a name="Text">Text Merging</a></h4>
+<h4 id="Text">Text Merging</h4>
 
 
 <p> If your viewer uses text, additional classes that&nbsp; compare

eclipse.platform.common/bundles/org.eclipse.platform.doc.isv/guide/team_ui_prefs.htm

@@ -26,7 +26,7 @@ <h3>Adding Preferences and Properties</h3>
 &lt;/extension&gt;</pre>
 <p>The preferences dialog shows the CVS preferences underneath the team
 category.</p>
-<p><img src="images/teamprefs.png" alt="" border="0" ></p>
+<p><img src="images/teamprefs.png" alt="" style="border:0" ></p>
 <p>&nbsp;</p>
 <p>Properties are added as described by <a href="../reference/extension-points/org_eclipse_ui_propertyPages.html"><b>org.eclipse.ui.propertyPages</b></a>.&nbsp;
 There is no special team category for properties, since a resource can only be

eclipse.platform.common/bundles/org.eclipse.platform.doc.isv/guide/workbench_advext_activities.htm

@@ -376,7 +376,7 @@ <h4>Using Expression-based Activities</h4>
 &nbsp;&nbsp;&nbsp;&nbsp;stateMap.put(RIGHTS_VARIABLE,&nbsp;<EM>YourRightsHandler</EM>.getUserRights());<br>
 &nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return </span>stateMap;<br>
 &nbsp;&nbsp;}<br><br>
-&nbsp;&nbsp;<span class="keyword">public </span>String<[]&nbsp;getProvidedSourceNames()&nbsp;{<br>
+&nbsp;&nbsp;<span class="keyword">public </span>String[]&nbsp;getProvidedSourceNames()&nbsp;{<br>
 
 &nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">return </span>PROVIDED_SOURCE_NAMES;<br>
 &nbsp;&nbsp;}<br><BR>&nbsp;&nbsp;<span 

eclipse.platform.common/bundles/org.eclipse.platform.doc.isv/whatsNew/platform_isv_whatsnew.html

@@ -4,7 +4,7 @@
   <meta name="copyright" content="Copyright (c) Eclipse contributors and others 2025. This page is made available under license. For full details see the LEGAL in the documentation book that contains this page."/>
   <meta charset="UTF-8"/>
   <link rel="STYLESHEET" href="../book.css"/>
-  <style type="text/css">
+  <style>
     body { max-width: 900px; font-family: sans-serif; }
   </style>
   <title>Eclipse Platform What's New</title>