Update runtime files.
diff --git a/runtime/syntax/forth.vim b/runtime/syntax/forth.vim
index 721bceb..fe98634 100644
--- a/runtime/syntax/forth.vim
+++ b/runtime/syntax/forth.vim
@@ -1,8 +1,8 @@
" Vim syntax file
" Language: FORTH
" Current Maintainer: Johan Kotlinski <kotlinski@gmail.com>
-" Previous Maintainer: Christian V. J. Brüssow <cvjb@cvjb.de>
-" Last Change: 2018-03-29
+" Previous Maintainer: Christian V. J. Br�ssow <cvjb@cvjb.de>
+" Last Change: 2023-01-12
" Filenames: *.fs,*.ft
" URL: https://github.com/jkotlinski/forth.vim
@@ -23,7 +23,6 @@
" Some special, non-FORTH keywords
syn keyword forthTodo contained TODO FIXME XXX
-syn match forthTodo contained 'Copyright\(\s([Cc])\)\=\(\s[0-9]\{2,4}\)\='
" Characters allowed in keywords
" I don't know if 128-255 are allowed in ANS-FORTH
@@ -98,13 +97,16 @@
syn keyword forthEndOfClassDef ;class
syn keyword forthEndOfObjectDef ;object
syn keyword forthDefine CONSTANT 2CONSTANT FCONSTANT VARIABLE 2VARIABLE
-syn keyword forthDefine FVARIABLE CREATE USER VALUE TO DEFER IS DOES> IMMEDIATE
+syn keyword forthDefine FVARIABLE CREATE USER VALUE TO DEFER IS <BUILDS DOES> IMMEDIATE
syn keyword forthDefine COMPILE-ONLY COMPILE RESTRICT INTERPRET POSTPONE EXECUTE
syn keyword forthDefine LITERAL CREATE-INTERPRET/COMPILE INTERPRETATION>
syn keyword forthDefine <INTERPRETATION COMPILATION> <COMPILATION ] LASTXT
syn keyword forthDefine COMP' POSTPONE, FIND-NAME NAME>INT NAME?INT NAME>COMP
syn keyword forthDefine NAME>STRING STATE C; CVARIABLE BUFFER: MARKER
syn keyword forthDefine , 2, F, C, COMPILE,
+syn match forthDefine "\[DEFINED]"
+syn match forthDefine "\[UNDEFINED]"
+syn match forthDefine "\[IF]"
syn match forthDefine "\[IFDEF]"
syn match forthDefine "\[IFUNDEF]"
syn match forthDefine "\[THEN]"
@@ -180,6 +182,7 @@
syn keyword forthMath DECIMAL HEX BASE
syn match forthInteger '\<-\=[0-9]\+.\=\>'
syn match forthInteger '\<&-\=[0-9]\+.\=\>'
+syn match forthInteger '\<#-\=[0-9]\+.\=\>'
" recognize hex and binary numbers, the '$' and '%' notation is for gforth
syn match forthInteger '\<\$\x*\x\+\>' " *1* --- don't mess
syn match forthInteger '\<\x*\d\x*\>' " *2* --- this order!
@@ -192,18 +195,18 @@
syn region forthComment start='0 \[if\]' end='\[endif\]' end='\[then\]' contains=forthTodo
" Strings
-syn region forthString start=+\.*\"+ end=+"+ end=+$+
+syn region forthString start=+\.*\"+ end=+"+ end=+$+ contains=@Spell
" XXX
-syn region forthString start=+s\"+ end=+"+ end=+$+
-syn region forthString start=+s\\\"+ end=+"+ end=+$+
-syn region forthString start=+c\"+ end=+"+ end=+$+
+syn region forthString start=+s\"+ end=+"+ end=+$+ contains=@Spell
+syn region forthString start=+s\\\"+ end=+"+ end=+$+ contains=@Spell
+syn region forthString start=+c\"+ end=+"+ end=+$+ contains=@Spell
" Comments
-syn match forthComment '\\\s.*$' contains=forthTodo,forthSpaceError
-syn region forthComment start='\\S\s' end='.*' contains=forthTodo,forthSpaceError
-syn match forthComment '\.(\s[^)]*)' contains=forthTodo,forthSpaceError
-syn region forthComment start='\(^\|\s\)\zs(\s' skip='\\)' end=')' contains=forthTodo,forthSpaceError
-syn region forthComment start='/\*' end='\*/' contains=forthTodo,forthSpaceError
+syn match forthComment '\\\%(\s.*\)\=$' contains=@Spell,forthTodo,forthSpaceError
+syn region forthComment start='\\S\s' end='.*' contains=@Spell,forthTodo,forthSpaceError
+syn match forthComment '\.(\s[^)]*)' contains=@Spell,forthTodo,forthSpaceError
+syn region forthComment start='\(^\|\s\)\zs(\s' skip='\\)' end=')' contains=@Spell,forthTodo,forthSpaceError
+syn region forthComment start='/\*' end='\*/' contains=@Spell,forthTodo,forthSpaceError
" Include files
syn match forthInclude '^INCLUDE\s\+\k\+'
@@ -260,3 +263,4 @@
let &cpo = s:cpo_save
unlet s:cpo_save
" vim:ts=8:sw=4:nocindent:smartindent:
+