Update Saved Files documentation page

Updated with details of the file format used for the
new Save Snippet Information feature.

Author: delphidabbler

Docs/Design/FileFormats/saved.html

@@ -5,7 +5,7 @@
  * v. 2.0. If a copy of the MPL was not distributed with this file, You can
  * obtain one at https://mozilla.org/MPL/2.0/
  *
- * Copyright (C) 2012-2021, Peter Johnson (gravatar.com/delphidabbler).
+ * Copyright (C) 2012-2025, Peter Johnson (gravatar.com/delphidabbler).
  *
  * CodeSnip File Format Documentation: Saved Files
 -->
@@ -46,20 +46,27 @@ <h2>
 </h2>
 
 <p>
-  CodeSnip saves external files in two different ways:
+  CodeSnip saves external files in three different ways:
 </p>
 
 <ol>
   <li>
-    By saving snippets to file from the <em>File | Save Snippet</em> menu.
+    By saving snippet information to file from the <em>File | Save Snippet Information</em> menu option.
   </li>
   <li>
-    By saving units to file from the <em>File | Save Unit</em> menu.
+    By saving snippets to file from the <em>File | Save Snippet</em> menu option.
+  </li>
+  <li>
+    By saving units to file from the <em>File | Save Unit</em> menu option.
   </li>
 </ol>
 
 <p>
-  In each case the following file types can be chosen by the user:
+  In the first case the snippet is always saved in rich text format.
+</p>
+
+<p>
+  In the second two cases the following file types can be chosen by the user:
 </p>
 
 <ul>
@@ -87,7 +94,11 @@ <h2>
 </h2>
 
 <p>
-  The encodings used depend on the file type and user choice. Different file
+  In the first case the RTF is always saved in ASCII format.
+</p>
+
+<p>
+  In the 2nd and 3rd cases the encodings used depend on the file type and user choice. Different file
   types have different encoding choices, as follows:
 </p>
 
@@ -140,7 +151,7 @@ <h2>
   <dd>
     <ul class="squashed">
       <li>
-        ANSI (system default code page)
+        ANSI (system default code page). ASCII format is actually used.
       </li>
     </ul>
   </dd>