Updated runtime files.  Remove version checks for Vim older than 6.0.
diff --git a/runtime/syntax/snnspat.vim b/runtime/syntax/snnspat.vim
index 5bfa48e..ffc4cae 100644
--- a/runtime/syntax/snnspat.vim
+++ b/runtime/syntax/snnspat.vim
@@ -8,9 +8,8 @@
 " SNNS http://www-ra.informatik.uni-tuebingen.de/SNNS/
 " is a simulator for neural networks.
 
-if version < 600
-  syntax clear
-elseif exists("b:current_syntax")
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
   finish
 endif
 
@@ -44,26 +43,19 @@
 syn match	snnspatComment	"#.*$" contains=snnspatTodo
 syn keyword	snnspatTodo	TODO XXX FIXME contained
 
-if version >= 508 || !exists("did_snnspat_syn_inits")
-  if version < 508
-    let did_snnspat_syn_inits = 1
-    command -nargs=+ HiLink hi link <args>
-  else
-    command -nargs=+ HiLink hi def link <args>
-  endif
+command -nargs=+ HiLink hi def link <args>
 
-  HiLink snnspatGen		Statement
-  HiLink snnspatHeader		Error
-  HiLink snnspatNoHeader	Define
-  HiLink snnspatNumbers		Number
-  HiLink snnspatComment		Comment
-  HiLink snnspatError		Error
-  HiLink snnspatTodo		Todo
-  HiLink snnspatAccepted	NONE
-  HiLink snnspatBrac		NONE
+HiLink snnspatGen		Statement
+HiLink snnspatHeader		Error
+HiLink snnspatNoHeader	Define
+HiLink snnspatNumbers		Number
+HiLink snnspatComment		Comment
+HiLink snnspatError		Error
+HiLink snnspatTodo		Todo
+HiLink snnspatAccepted	NONE
+HiLink snnspatBrac		NONE
 
-  delcommand HiLink
-endif
+delcommand HiLink
 
 let b:current_syntax = "snnspat"