diff --git a/runtime/syntax/awk.vim b/runtime/syntax/awk.vim
index ae0f217..7c0682c 100644
--- a/runtime/syntax/awk.vim
+++ b/runtime/syntax/awk.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	awk, nawk, gawk, mawk
 " Maintainer:	Antonio Colombo <azc100@gmail.com>
-" Last Change:	2016 Jul 15
+" Last Change:	2016 Sep 05
 
 " AWK  ref. is: Alfred V. Aho, Brian W. Kernighan, Peter J. Weinberger
 " The AWK Programming Language, Addison-Wesley, 1988
@@ -71,6 +71,10 @@
 syn keyword awkVariables	FNR NF FUNCTAB NR PROCINFO RLENGTH RSTART 
 syn keyword awkVariables	RT SYMTAB
 
+" Arithmetic operators: +, and - take care of ++, and --
+syn match   awkOperator		"+\|-\|\*\|/\|%\|="
+syn match   awkOperator		"+=\|-=\|\*=\|/=\|%="
+syn match   awkOperator		"\^\|\^="
 
 " Octal format character.
 syn match   awkSpecialCharacter display contained "\\[0-7]\{1,3\}"
@@ -124,11 +128,6 @@
 
 "syn match  awkIdentifier	"\<[a-zA-Z_][a-zA-Z0-9_]*\>"
 
-" Arithmetic operators: +, and - take care of ++, and --
-syn match   awkOperator	"+\|-\|\*\|/\|%\|="
-syn match   awkOperator	"+=\|-=\|\*=\|/=\|%="
-syn match   awkOperator	"^\|^="
-
 " Comparison expressions.
 syn match   awkExpression	"==\|>=\|=>\|<=\|=<\|\!="
 syn match   awkExpression	"\~\|\!\~"
@@ -167,7 +166,6 @@
 syn sync ccomment awkArray maxlines=10
 
 " Define the default highlighting.
-" Only used when an item doesn't have highlighting yet
 hi def link awkConditional	Conditional
 hi def link awkFunction		Function
 hi def link awkRepeat		Repeat
diff --git a/runtime/syntax/help.vim b/runtime/syntax/help.vim
index d0c3fa8..9f056ee 100644
--- a/runtime/syntax/help.vim
+++ b/runtime/syntax/help.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	Vim help file
 " Maintainer:	Bram Moolenaar (Bram@vim.org)
-" Last Change:	2016 Apr 01
+" Last Change:	2016 Sep 02
 
 " Quit when a (custom) syntax file was already loaded
 if exists("b:current_syntax")
@@ -54,6 +54,7 @@
   syn match helpIgnore		"." contained
 endif
 syn keyword helpNote		note Note NOTE note: Note: NOTE: Notes Notes:
+syn keyword helpWarning		WARNING: Warning:
 syn match helpSpecial		"\<N\>"
 syn match helpSpecial		"\<N\.$"me=e-1
 syn match helpSpecial		"\<N\.\s"me=e-2
@@ -169,6 +170,7 @@
 hi def link helpNotVi		Special
 hi def link helpSpecial		Special
 hi def link helpNote		Todo
+hi def link helpWarning		Todo
 
 hi def link helpComment		Comment
 hi def link helpConstant	Constant
diff --git a/runtime/syntax/prolog.vim b/runtime/syntax/prolog.vim
index f8fb966..3b09bb3 100644
--- a/runtime/syntax/prolog.vim
+++ b/runtime/syntax/prolog.vim
@@ -1,7 +1,9 @@
 " Vim syntax file
 " Language:    PROLOG
-" Maintainers: Thomas Koehler <jean-luc@picard.franken.de>
-" Last Change: 2013 May 23
+" Maintainer:  Thomas Koehler <jean-luc@picard.franken.de>
+"              Please be aware: I'm often slow to answer email due to a high
+"              non-computer related workload (sometimes 4-8 weeks)
+" Last Change: 2016 September 6
 " URL:         http://gott-gehabt.de/800_wer_wir_sind/thomas/Homepage/Computer/vim/syntax/prolog.vim
 
 " There are two sets of highlighting in here:
diff --git a/runtime/syntax/uil.vim b/runtime/syntax/uil.vim
index ccf07d5..088a0f6 100644
--- a/runtime/syntax/uil.vim
+++ b/runtime/syntax/uil.vim
@@ -1,7 +1,9 @@
 " Vim syntax file
 " Language:	Motif UIL (User Interface Language)
 " Maintainer:	Thomas Koehler <jean-luc@picard.franken.de>
-" Last Change:	2013 May 23
+"		Please be aware: I'm often slow to answer email due to a high
+"		non-computer related workload (sometimes 4-8 weeks)
+" Last Change:	2016 September 6
 " URL:		http://gott-gehabt.de/800_wer_wir_sind/thomas/Homepage/Computer/vim/syntax/uil.vim
 
 " quit when a syntax file was already loaded
diff --git a/runtime/syntax/vim.vim b/runtime/syntax/vim.vim
index ff8657c..3eef122 100644
--- a/runtime/syntax/vim.vim
+++ b/runtime/syntax/vim.vim
@@ -77,7 +77,7 @@
 
 " Function Names {{{2
 syn keyword vimFuncName contained	abs append argv assert_fails assert_notequal atan2 buflisted bufwinid byteidxcomp char2nr ch_getbufnr ch_logfile ch_sendexpr cindent complete_add cos cursor diff_filler eval exepath extend filter floor foldclosed foldtextresult garbagecollect getbufvar getcmdline getcompletion getfperm getline getpos gettabinfo getwinposx glob2regpat haslocaldir histget hostname input inputsave isdirectory job_getchannel job_status js_decode json_encode libcall line2byte log map match matcharg matchlist max mode nr2char perleval printf pyeval reltime remote_expr remote_read rename reverse screenchar search searchpairpos serverlist setcmdpos setloclist setqflist settabwinvar shellescape sin soundfold split str2nr strdisplaywidth stridx strpart strwidth synconcealed synIDtrans systemlist tabpagewinnr tan test_alloc_fail test_garbagecollect_now test_null_job test_null_string timer_pause timer_stopall tr undofile values wildmenumode win_findbuf winheight winline winrestview wordcount
-syn keyword vimFuncName contained	acos argc asin assert_false assert_notmatch browse bufloaded bufwinnr call ch_close ch_getjob ch_open ch_sendraw clearmatches complete_check cosh deepcopy diff_hlID eventhandler exists feedkeys finddir fmod foldclosedend foreground get getchar getcmdpos getcurpos getfsize getloclist getqflist gettabvar getwinposy globpath hasmapto histnr iconv inputdialog inputsecret islocked job_info job_stop js_encode keys libcallnr lispindent log10 maparg matchadd matchdelete matchstr min mzeval or pow pumvisible range reltimefloat remote_foreground remote_send repeat round screencol searchdecl searchpos setbufvar setfperm setmatches setreg setwinvar shiftwidth sinh spellbadword sqrt strcharpart strftime string strridx submatch synID synstack tabpagebuflist tagfiles tanh test_autochdir test_null_channel test_null_list test_settime timer_start tolower trunc undotree virtcol winbufnr win_getid win_id2tabwin winnr winsaveview writefile
+syn keyword vimFuncName contained	acos argc asin assert_false assert_notmatch browse bufloaded bufwinnr call ch_close ch_close_in ch_getjob ch_open ch_sendraw clearmatches complete_check cosh deepcopy diff_hlID eventhandler exists feedkeys finddir fmod foldclosedend foreground get getchar getcmdpos getcurpos getfsize getloclist getqflist gettabvar getwinposy globpath hasmapto histnr iconv inputdialog inputsecret islocked job_info job_stop js_encode keys libcallnr lispindent log10 maparg matchadd matchdelete matchstr min mzeval or pow pumvisible range reltimefloat remote_foreground remote_send repeat round screencol searchdecl searchpos setbufvar setfperm setmatches setreg setwinvar shiftwidth sinh spellbadword sqrt strcharpart strftime string strridx submatch synID synstack tabpagebuflist tagfiles tanh test_autochdir test_null_channel test_null_list test_settime timer_start tolower trunc undotree virtcol winbufnr win_getid win_id2tabwin winnr winsaveview writefile
 syn keyword vimFuncName contained	add argidx assert_equal assert_inrange assert_true browsedir bufname byte2line ceil ch_evalexpr ch_info ch_read ch_setoptions col confirm count delete empty executable exp filereadable findfile fnameescape foldlevel funcref getbufinfo getcharmod getcmdtype getcwd getftime getmatches getreg gettabwinvar getwinvar has histadd hlexists indent inputlist insert isnan job_setoptions join json_decode len line localtime luaeval mapcheck matchaddpos matchend matchstrpos mkdir nextnonblank pathshorten prevnonblank py3eval readfile reltimestr remote_peek remove resolve screenattr screenrow searchpair server2client setcharsearch setline setpos settabvar sha256 simplify sort spellsuggest str2float strchars strgetchar strlen strtrans substitute synIDattr system tabpagenr taglist tempname test_disable_char_avail test_null_dict test_null_partial timer_info timer_stop toupper type uniq visualmode wincol win_gotoid win_id2win winrestcmd winwidth xor
 syn keyword vimFuncName contained	and arglistid assert_exception assert_match atan bufexists bufnr byteidx changenr ch_evalraw ch_log ch_readraw ch_status complete copy cscope_connection did_filetype escape execute expand filewritable float2nr fnamemodify foldtext function getbufline getcharsearch getcmdwintype getfontname getftype getpid getregtype getwininfo glob has_key histdel hlID index inputrestore invert items job_start