Update runtime files.
diff --git a/runtime/syntax/sml.vim b/runtime/syntax/sml.vim
index fa4524f..afff530 100644
--- a/runtime/syntax/sml.vim
+++ b/runtime/syntax/sml.vim
@@ -3,13 +3,16 @@
" Filenames: *.sml *.sig
" Maintainers: Markus Mottl <markus.mottl@gmail.com>
" Fabrizio Zeno Cornelli <zeno@filibusta.crema.unimi.it>
-" URL: http://www.ocaml.info/vim/syntax/sml.vim
-" Last Change: 2006 Oct 23 - Fixed character highlighting bug (MM)
-" 2002 Jun 02 - Fixed small typo (MM)
-" 2001 Nov 20 - Fixed small highlighting bug with modules (MM)
+" Last Change: 2019 Oct 01 - Only spell check strings & comments (Chuan Wei Foo)
+" 2015 Aug 31 - Fixed opening of modules (Ramana Kumar)
+" 2006 Oct 23 - Fixed character highlighting bug (MM)
" quit when a syntax file was already loaded
if exists("b:current_syntax")
+
+" Disable spell checking of syntax.
+syn spell notoplevel
+
finish
endif
@@ -52,7 +55,7 @@
" Comments
-syn region smlComment start="(\*" end="\*)" contains=smlComment,smlTodo
+syn region smlComment start="(\*" end="\*)" contains=smlComment,smlTodo,@Spell
syn keyword smlTodo contained TODO FIXME XXX
@@ -82,7 +85,7 @@
syn region smlModSpec matchgroup=smlKeyword start="\<structure\>" matchgroup=smlModule end="\<\u\(\w\|'\)*\>" contained contains=@smlAllErrs,smlComment skipwhite skipempty nextgroup=smlModTRWith,smlMPRestr
" "open"
-syn region smlNone matchgroup=smlKeyword start="\<open\>" matchgroup=smlModule end="\<\u\(\w\|'\)*\(\.\u\(\w\|'\)*\)*\>" contains=@smlAllErrs,smlComment
+syn region smlNone matchgroup=smlKeyword start="\<open\>" matchgroup=smlModule end="\<\w\(\w\|'\)*\(\.\w\(\w\|'\)*\)*\>" contains=@smlAllErrs,smlComment
" "structure" - somewhat complicated stuff ;-)
syn region smlModule matchgroup=smlKeyword start="\<\(structure\|functor\)\>" matchgroup=smlModule end="\<\u\(\w\|'\)*\>" contains=@smlAllErrs,smlComment skipwhite skipempty nextgroup=smlPreDef
@@ -136,7 +139,7 @@
syn match smlCharacter +#"\\""\|#"."\|#"\\\d\d\d"+
syn match smlCharErr +#"\\\d\d"\|#"\\\d"+
-syn region smlString start=+"+ skip=+\\\\\|\\"+ end=+"+
+syn region smlString start=+"+ skip=+\\\\\|\\"+ end=+"+ contains=@Spell
syn match smlFunDef "=>"
syn match smlRefAssign ":="
@@ -149,9 +152,9 @@
syn match smlKeyChar "\*"
syn match smlKeyChar "="
-syn match smlNumber "\<-\=\d\+\>"
-syn match smlNumber "\<-\=0[x|X]\x\+\>"
-syn match smlReal "\<-\=\d\+\.\d*\([eE][-+]\=\d\+\)\=[fl]\=\>"
+syn match smlNumber "\<-\=\d\+\>"
+syn match smlNumber "\<-\=0[x|X]\x\+\>"
+syn match smlReal "\<-\=\d\+\.\d*\([eE][-+]\=\d\+\)\=[fl]\=\>"
" Synchronization
syn sync minlines=20
@@ -167,49 +170,49 @@
" Define the default highlighting.
" Only when an item doesn't have highlighting yet
-hi def link smlBraceErr Error
-hi def link smlBrackErr Error
-hi def link smlParenErr Error
+hi def link smlBraceErr Error
+hi def link smlBrackErr Error
+hi def link smlParenErr Error
-hi def link smlCommentErr Error
+hi def link smlCommentErr Error
-hi def link smlEndErr Error
-hi def link smlThenErr Error
+hi def link smlEndErr Error
+hi def link smlThenErr Error
-hi def link smlCharErr Error
+hi def link smlCharErr Error
-hi def link smlComment Comment
+hi def link smlComment Comment
-hi def link smlModPath Include
-hi def link smlModule Include
-hi def link smlModParam1 Include
-hi def link smlModType Include
-hi def link smlMPRestr3 Include
-hi def link smlFullMod Include
+hi def link smlModPath Include
+hi def link smlModule Include
+hi def link smlModParam1 Include
+hi def link smlModType Include
+hi def link smlMPRestr3 Include
+hi def link smlFullMod Include
hi def link smlModTypeRestr Include
-hi def link smlWith Include
-hi def link smlMTDef Include
+hi def link smlWith Include
+hi def link smlMTDef Include
hi def link smlConstructor Constant
-hi def link smlModPreRHS Keyword
-hi def link smlMPRestr2 Keyword
-hi def link smlKeyword Keyword
-hi def link smlFunDef Keyword
-hi def link smlRefAssign Keyword
-hi def link smlKeyChar Keyword
-hi def link smlAnyVar Keyword
-hi def link smlTopStop Keyword
-hi def link smlOperator Keyword
+hi def link smlModPreRHS Keyword
+hi def link smlMPRestr2 Keyword
+hi def link smlKeyword Keyword
+hi def link smlFunDef Keyword
+hi def link smlRefAssign Keyword
+hi def link smlKeyChar Keyword
+hi def link smlAnyVar Keyword
+hi def link smlTopStop Keyword
+hi def link smlOperator Keyword
-hi def link smlBoolean Boolean
-hi def link smlCharacter Character
-hi def link smlNumber Number
-hi def link smlReal Float
-hi def link smlString String
-hi def link smlType Type
-hi def link smlTodo Todo
-hi def link smlEncl Keyword
+hi def link smlBoolean Boolean
+hi def link smlCharacter Character
+hi def link smlNumber Number
+hi def link smlReal Float
+hi def link smlString String
+hi def link smlType Type
+hi def link smlTodo Todo
+hi def link smlEncl Keyword
let b:current_syntax = "sml"