Add a note on the WAL file

docs/index.html

@@ -4497,6 +4497,11 @@
   </table>
   </blockquote></br>
 
+  <p>
+    In addition to the <i>stella.sqlite3</i> file, there may also be a file
+    <i>stella.sqlite3-wal</i>. This file is part of the database and must not be deleted!
+  </p>
+
   <h2><b><a name="Cheats">Cheatcode Manager</a></b></h2>
   <blockquote>
 
@@ -4830,7 +4835,7 @@ Ms Pac-Man (Stella extended codes):
         <tr><td>Paddles </td><td>Standard paddle controllers for use with games such as Breakout and Warlords. One pair of controller per connector (allows for 4-player Warlords).</td></tr>
         <tr><td>Paddles_IAxis &#185</td><td>Same as Paddles, except the axes are inverted.</td></tr>
         <tr><td>Paddles_IAxDr &#185</td><td>Same as Paddles, except both the axes and direction of movement are inverted.</td></tr>
-        <tr><td>Driving &#185 </td><td>Looks like a paddle, but allows 360° movement. Only one unit per connector, unlike paddles which were sold in pairs.</td></tr>
+        <tr><td>Driving &#185 </td><td>Looks like a paddle, but allows 360<EFBFBD> movement. Only one unit per connector, unlike paddles which were sold in pairs.</td></tr>
         <tr><td>Keyboard</td><td>Also known as the Star Raiders controller, functionally identical to the Kid's Controller and Keyboard Controller. Game included an overlay with commands, for use with Star Raiders.</td></tr>
         <tr><td>AmigaMouse</td><td>Commodore Amiga computer mouse.</td></tr>
         <tr><td>AtariMouse</td><td>Atari ST computer mouse.</td></tr>
@@ -4922,7 +4927,7 @@ Ms Pac-Man (Stella extended codes):
         <tr><th>&nbsp;Type&nbsp;</th><th>Description</th></tr>
         <tr><td>Joystick</td><td>Atari's famous black joystick that was originally included with the system.</td></tr>
         <tr><td>Paddles </td><td>Standard paddle controllers, only (up to 8) fire buttons supported for QuadTari.</td></tr>
-        <tr><td>Driving</td><td>Looks like a paddle, but allows 360° movement. Only one unit per connector, unlike paddles which were sold in pairs.</td></tr>
+        <tr><td>Driving</td><td>Looks like a paddle, but allows 360<EFBFBD> movement. Only one unit per connector, unlike paddles which were sold in pairs.</td></tr>
         <tr><td><a href="https://atariage.com/store/index.php?l=product_detail&p=1045">AtariVox</a></td><td>A SpeakJet based unlimited-vocabulary speech/sound synthesizer with 32K EEPROM.</td></tr>
         <tr><td>SaveKey</td><td>A 32K EEPROM for saving high scores, etc. (the EEPROM portion of an AtariVox).</td></tr>
       </table></td>