update some doc copyright dates/formatting

Author: bdbaddog

doc/man/scons.xml

@@ -7473,10 +7473,13 @@ and will silently revert to non-cached behavior in such cases.</para>
 <refsect1 id='authors'>
 <title>AUTHORS</title>
 
-<para>Originally: Steven Knight <email>[email protected]</email>
-and Anthony Roach <email>[email protected]</email>.
-Since 2010: The SCons Development Team <email>[email protected]</email>.
-</para>
+  <para>Originally: Steven Knight
+    <email>[email protected]</email>
+    and Anthony Roach <email>[email protected]</email>.
+  </para>
+  <para>
+    Since 2010: The SCons Development Team <email>[email protected]</email>.
+  </para>
 </refsect1>
 </refentry>
 </reference>

doc/man/sconsign.xml

@@ -320,7 +320,8 @@ on GitHub</ulink>.
 <refsect1 id='authors'>
 <title>AUTHORS</title>
 <para>Originally: Steven Knight <email>[email protected]</email>
-and Anthony Roach <email>[email protected]</email>.
+  and Anthony Roach <email>[email protected]</email>.</para>
+  <para>
 Since 2010: The SCons Development Team <email>[email protected]</email>.
 </para>
 </refsect1>

doc/user/copyright.xml

@@ -35,7 +35,7 @@
 
     <blockquote>
         <para>
-            SCons User's Guide Copyright (c) 2004-2019 Steven Knight
+            SCons User's Guide Copyright (c) 2004-2020 The SCons Foundation
         </para>
     </blockquote>
 

doc/version.xml

@@ -2,6 +2,6 @@
 <!--
 THIS IS AN AUTOMATICALLY-GENERATED FILE.  DO NOT EDIT.
 -->
-<!ENTITY builddate "2015-06-17">
-<!ENTITY buildversion "2.3.5">
+<!ENTITY builddate "2020-07-04">
+<!ENTITY buildversion "4.0.0">
 <!ENTITY buildrevision "1">