diff --git a/runtime/syntax/aptconf.vim b/runtime/syntax/aptconf.vim
index 8cb1432..d51e7bd 100644
--- a/runtime/syntax/aptconf.vim
+++ b/runtime/syntax/aptconf.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	APT config file
 " Maintainer:	Yann Amar <quidame@poivron.org>
-" Last Change:	2015 Dec 22
+" Last Change:	2021 Jul 12
 
 " quit when a syntax file was already loaded
 if !exists("main_syntax")
@@ -396,10 +396,13 @@
 " }}}
 " Unattended Upgrade: {{{
 syn keyword	aptconfUnattendedUpgrade contained
-	\ AutoFixInterruptedDpkg Automatic-Reboot Automatic-Reboot-Time
-	\ Automatic-Reboot-WithUsers InstallOnShutdown Mail MailOnlyOnError
-	\ MinimalSteps Origins-Pattern Package-Blacklist
-	\ Remove-Unused-Dependencies
+	\ Allow-APT-Mark-Fallback Allow-downgrade AutoFixInterruptedDpkg
+	\ Automatic-Reboot Automatic-Reboot-Time Automatic-Reboot-WithUsers
+	\ Debug InstallOnShutdown Mail MailOnlyOnError MailReport MinimalSteps
+	\ OnlyOnACPower Origins-Pattern Package-Blacklist
+	\ Remove-New-Unused-Dependencies Remove-Unused-Dependencies
+	\ Remove-Unused-Kernel-Packages Skip-Updates-On-Metered-Connections
+	\ SyslogEnable SyslogFacility Verbose
 
 syn cluster	aptconfUnattendedUpgrade_ contains=aptconfUnattendedUpgrade
 " }}}
diff --git a/runtime/syntax/pascal.vim b/runtime/syntax/pascal.vim
index 3ab5c2e..206df21 100644
--- a/runtime/syntax/pascal.vim
+++ b/runtime/syntax/pascal.vim
@@ -3,7 +3,7 @@
 " Maintainer:		Doug Kearns <dougkearns@gmail.com>
 " Previous Maintainers:	Xavier Crégut <xavier.cregut@enseeiht.fr>
 "			Mario Eusebio <bio@dq.fct.unl.pt>
-" Last Change:		2021 Apr 23
+" Last Change:		2021 May 20
 
 " Contributors: Tim Chase <tchase@csc.com>,
 "		Stas Grabois <stsi@vtrails.com>,
diff --git a/runtime/syntax/redif.vim b/runtime/syntax/redif.vim
index 198d5c7..9fa9064 100644
--- a/runtime/syntax/redif.vim
+++ b/runtime/syntax/redif.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:          ReDIF
 " Maintainer:        Axel Castellane <axel.castellane@polytechnique.edu>
-" Last Change:       2021 Jun 17
+" Last Change:       2013 April 17
 " Original Author:   Axel Castellane
 " Source:            http://openlib.org/acmes/root/docu/redif_1.html
 " File Extension:    rdf
@@ -932,7 +932,7 @@
 " Sync: The template-type (ReDIF-Paper, ReDIF-Archive, etc.) influences which
 " fields can follow. Thus sync must search backwards for it.
 "
-" I would like to simply ask VIM to search backward for the first occurrence of
+" I would like to simply ask VIM to search backward for the first occurence of
 " /^Template-Type:/, but it does not seem to be possible, so I have to start
 " from the beginning of the file... This might slow down a lot for files that
 " contain a lot of Template-Type statements.