Replace TODO placeholders with CodeSnip ver & date

Update design documents with CodeSnip release version and release date
relating to changes in config, export, user database and REML file
formats.

Some other minor tweak too.

Author: delphidabbler

Docs/Design/FileFormats/config.html

@@ -167,7 +167,7 @@ <h3>
 </p>
 
 <p>
-  There have been several versions of this file. The current one is version 18 &laquo;&laquo;TODO&raquo;&raquo;. The change to version 18 came with CodeSnip v4.20.0&laquo;&laquo;TODO&raquo;&raquo; and the addition of the [Prefs] section.
+  There have been several versions of this file. The current one is version 19. The change to version 19 came with CodeSnip v4.21.0 and the addition of the [Compilers] section and the <code class="key">CanAutoInstall</code> key in the [Cmp:XXX] sections.
 </p>
 
 <p>
@@ -762,7 +762,7 @@ <h4>
       The version number of the config file. Incremented whenever the file format changes. If this section or this value is missing then the default value is <code class="value">1</code>.
     </div>
     <div class="half-spaced">
-      The current value is <code class="value">16</code>.
+      The current value is <code class="value">19</code>.
     </div>
   </dd>
   <dt>

Docs/Design/FileFormats/export.html

@@ -175,7 +175,7 @@ <h2>
         <em>version</em>
       </dt>
       <dd>
-        Identifies version of file. Determines which tags are valid and
+        Identifies major version of file. Determines which tags are valid and
         establishes rules concerning content. Valid versions are 1 to 7.
       </dd>
     </dl>
@@ -979,10 +979,10 @@ <h2>
         Updated with CodeSnip v4.18.0 to add support for Delphi 11.x Alexandria.
       </dd>
       <dt>
-        <em>Version 7.3 - &laquo;&laquo;TODO&raquo;&raquo;</em>
+        <em>Version 7.3 - 16 December 2022</em>
       </dt>
       <dd>
-        Updated with CodeSnip v&laquo;&laquo;TODO&raquo;&raquo; to add support for REML v5, which is backward compatible with REML v4.
+        Updated with CodeSnip v4.21.0 to add support for REML v5, which is backward compatible with REML v4.
       </dd>
     </dl>
   </dd>

Docs/Design/FileFormats/user-db.html

@@ -199,7 +199,7 @@ <h3 id="xml-file">
         <em>version</em>
       </dt>
       <dd>
-        Identifies version of file. Determines which tags are valid and rules
+        Identifies major version of file. Determines which tags are valid and rules
         concerning content. Valid versions are 1..6.
       </dd>
     </dl>
@@ -1015,10 +1015,10 @@ <h2>
         Updated with CodeSnip v4.18.0 to add support for Delphi 11.x Alexandria.
       </dd>
       <dt>
-        <em>Version 6.11 - &laquo;&laquo;TODO&raquo;&raquo;</em>
+        <em>Version 6.11 - 16 December 2022</em>
       </dt>
       <dd>
-        Updated with CodeSnip v&laquo;&laquo;TODO&raquo;&raquo; to add support for REML v5, which is backwards compatible with REML v4.
+        Updated with CodeSnip v4.21.0 to add support for REML v5, which is backwards compatible with REML v4.
       </dd>
     </dl>
   </dd>

Docs/Design/reml.html

@@ -625,11 +625,11 @@ <h1>Change Log</h1>
   </ul>
 
   <p>
-    <strong>v5 of &laquo;&laquo;TODO&raquo;&raquo;</strong>
+    <strong>v5 of 2022-12-16</strong>
   </p>
 
   <p>
-    Introduced in CodeSnip &laquo;&laquo;TODO&raquo;&raquo;
+    Introduced in CodeSnip v4.21.0
   </p>
 
   <ul>