diff --git a/runtime/syntax/git.vim b/runtime/syntax/git.vim
index 48264c7..a8467ed 100644
--- a/runtime/syntax/git.vim
+++ b/runtime/syntax/git.vim
@@ -1,7 +1,7 @@
 " Vim syntax file
 " Language:	generic git output
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
-" Last Change:	2010 May 21
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -13,7 +13,7 @@
 syn include @gitDiff syntax/diff.vim
 
 syn region gitHead start=/\%^/ end=/^$/
-syn region gitHead start=/\%(^commit \x\{40\}\%(\s*(.*)\)\=$\)\@=/ end=/^$/
+syn region gitHead start=/\%(^commit\%( \x\{40\}\)\{1,\}\%(\s*(.*)\)\=$\)\@=/ end=/^$/
 
 " For git reflog and git show ...^{tree}, avoid sync issues
 syn match gitHead /^\d\{6\} \%(\w\{4} \)\=\x\{40\}\%( [0-3]\)\=\t.*/
@@ -25,12 +25,14 @@
 syn region gitDiffMerge start=/^\%(diff --\%(cc\|combined\) \)\@=/ end=/^\%(diff --\|$\)\@=/ contains=@gitDiff
 syn region gitDiffMerge start=/^\%(@@@@* -\)\@=/ end=/^\%(diff --\|$\)\@=/ contains=@gitDiff
 syn match gitDiffAdded "^ \++.*" contained containedin=gitDiffMerge
+syn match gitDiffAdded "{+.*+}" contained containedin=gitDiff
 syn match gitDiffRemoved "^ \+-.*" contained containedin=gitDiffMerge
+syn match gitDiffRemoved "\[-.*-\]" contained containedin=gitDiff
 
 syn match  gitKeyword /^\%(object\|type\|tag\|commit\|tree\|parent\|encoding\)\>/ contained containedin=gitHead nextgroup=gitHash,gitType skipwhite
 syn match  gitKeyword /^\%(tag\>\|ref:\)/ contained containedin=gitHead nextgroup=gitReference skipwhite
 syn match  gitKeyword /^Merge:/  contained containedin=gitHead nextgroup=gitHashAbbrev skipwhite
-syn match  gitMode    /^\d\{6\}/ contained containedin=gitHead nextgroup=gitType,gitHash skipwhite
+syn match  gitMode    /^\d\{6\}\>/ contained containedin=gitHead nextgroup=gitType,gitHash skipwhite
 syn match  gitIdentityKeyword /^\%(author\|committer\|tagger\)\>/ contained containedin=gitHead nextgroup=gitIdentity skipwhite
 syn match  gitIdentityHeader /^\%(Author\|Commit\|Tagger\):/ contained containedin=gitHead nextgroup=gitIdentity skipwhite
 syn match  gitDateHeader /^\%(AuthorDate\|CommitDate\|Date\):/ contained containedin=gitHead nextgroup=gitDate skipwhite
diff --git a/runtime/syntax/gitcommit.vim b/runtime/syntax/gitcommit.vim
index 5e0642f..63b1ce9 100644
--- a/runtime/syntax/gitcommit.vim
+++ b/runtime/syntax/gitcommit.vim
@@ -2,7 +2,7 @@
 " Language:	git commit file
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:	*.git/COMMIT_EDITMSG
-" Last Change:	2016 Aug 29
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -18,11 +18,18 @@
 syn include @gitcommitDiff syntax/diff.vim
 syn region gitcommitDiff start=/\%(^diff --\%(git\|cc\|combined\) \)\@=/ end=/^\%(diff --\|$\|#\)\@=/ fold contains=@gitcommitDiff
 
-syn match   gitcommitFirstLine	"\%^[^#].*"  nextgroup=gitcommitBlank skipnl
-syn match   gitcommitSummary	"^.\{0,50\}" contained containedin=gitcommitFirstLine nextgroup=gitcommitOverflow contains=@Spell
+syn match   gitcommitSummary	"^.*\%<51v." contained containedin=gitcommitFirstLine nextgroup=gitcommitOverflow contains=@Spell
 syn match   gitcommitOverflow	".*" contained contains=@Spell
 syn match   gitcommitBlank	"^[^#].*" contained contains=@Spell
-syn match   gitcommitComment	"^#.*"
+
+if get(g:, "gitcommit_cleanup") is# "scissors"
+  syn match gitcommitFirstLine	"\%^.*" nextgroup=gitcommitBlank skipnl
+  syn region gitcommitComment start=/^# -\+ >8 -\+$/ end=/\%$/ contains=gitcommitDiff
+else
+  syn match gitcommitFirstLine	"\%^[^#].*" nextgroup=gitcommitBlank skipnl
+  syn match gitcommitComment	"^#.*"
+endif
+
 syn match   gitcommitHead	"^\%(#   .*\n\)\+#$" contained transparent
 syn match   gitcommitOnBranch	"\%(^# \)\@<=On branch" contained containedin=gitcommitComment nextgroup=gitcommitBranch skipwhite
 syn match   gitcommitOnBranch	"\%(^# \)\@<=Your branch .\{-\} '" contained containedin=gitcommitComment nextgroup=gitcommitBranch skipwhite
diff --git a/runtime/syntax/gitconfig.vim b/runtime/syntax/gitconfig.vim
index 668764e..e5eaf10 100644
--- a/runtime/syntax/gitconfig.vim
+++ b/runtime/syntax/gitconfig.vim
@@ -2,24 +2,22 @@
 " Language:	git config file
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:	gitconfig, .gitconfig, *.git/config
-" Last Change:	2019 Sep 27
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
 endif
 
-setlocal iskeyword+=-
-setlocal iskeyword-=_
 syn case ignore
 syn sync minlines=10
 
 syn match   gitconfigComment	"[#;].*" contains=@Spell
 syn match   gitconfigSection	"\%(^\s*\)\@<=\[[a-z0-9.-]\+\]"
 syn match   gitconfigSection	'\%(^\s*\)\@<=\[[a-z0-9.-]\+ \+\"\%([^\\"]\|\\.\)*"\]'
-syn match   gitconfigVariable	 "\%(^\s*\)\@<=\a\k*\%(\s*\%([=#;]\|$\)\)\@=" nextgroup=gitconfigAssignment skipwhite
+syn match   gitconfigVariable	"\%(^\s*\)\@<=\a[a-z0-9-]*\%(\s*\%([=#;]\|$\)\)\@=" nextgroup=gitconfigAssignment skipwhite
 syn region  gitconfigAssignment  matchgroup=gitconfigNone start=+=\s*+ skip=+\\+ end=+\s*$+ contained contains=gitconfigBoolean,gitconfigNumber,gitConfigString,gitConfigEscape,gitConfigError,gitconfigComment keepend
 syn keyword gitconfigBoolean true false yes no contained
-syn match   gitconfigNumber  "\d\+" contained
+syn match   gitconfigNumber  "\<\d\+\>" contained
 syn region  gitconfigString  matchgroup=gitconfigDelim start=+"+ skip=+\\+ end=+"+ matchgroup=gitconfigError end=+[^\\"]\%#\@!$+ contained contains=gitconfigEscape,gitconfigEscapeError
 syn match   gitconfigError  +\\.+	 contained
 syn match   gitconfigEscape +\\[\\"ntb]+ contained
@@ -32,7 +30,7 @@
 hi def link gitconfigNumber		Number
 hi def link gitconfigString		String
 hi def link gitconfigDelim		Delimiter
-hi def link gitconfigEscape		Delimiter
+hi def link gitconfigEscape		Special
 hi def link gitconfigError		Error
 
 let b:current_syntax = "gitconfig"
diff --git a/runtime/syntax/gitrebase.vim b/runtime/syntax/gitrebase.vim
index a944c14..1ec2b59 100644
--- a/runtime/syntax/gitrebase.vim
+++ b/runtime/syntax/gitrebase.vim
@@ -2,7 +2,7 @@
 " Language:	git rebase --interactive
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:	git-rebase-todo
-" Last Change:	2016 Aug 29
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -10,31 +10,48 @@
 
 syn case match
 
-syn match   gitrebaseHash   "\v<\x{7,40}>"                             contained
-syn match   gitrebaseCommit "\v<\x{7,40}>"  nextgroup=gitrebaseSummary skipwhite
+syn match   gitrebaseHash   "\v<\x{7,}>"                               contained
+syn match   gitrebaseCommit "\v<\x{7,}>"    nextgroup=gitrebaseSummary skipwhite
 syn match   gitrebasePick   "\v^p%(ick)=>"   nextgroup=gitrebaseCommit skipwhite
 syn match   gitrebaseReword "\v^r%(eword)=>" nextgroup=gitrebaseCommit skipwhite
 syn match   gitrebaseEdit   "\v^e%(dit)=>"   nextgroup=gitrebaseCommit skipwhite
 syn match   gitrebaseSquash "\v^s%(quash)=>" nextgroup=gitrebaseCommit skipwhite
 syn match   gitrebaseFixup  "\v^f%(ixup)=>"  nextgroup=gitrebaseCommit skipwhite
 syn match   gitrebaseExec   "\v^%(x|exec)>" nextgroup=gitrebaseCommand skipwhite
+syn match   gitrebaseBreak  "\v^b%(reak)=>"
 syn match   gitrebaseDrop   "\v^d%(rop)=>"   nextgroup=gitrebaseCommit skipwhite
+syn match   gitrebaseNoop   "\v^noop>"
+syn match   gitrebaseMerge  "\v^m(erge)=>"   nextgroup=gitrebaseMergeOption,gitrebaseName skipwhite
+syn match   gitrebaseLabel  "\v^l(abel)=>"   nextgroup=gitrebaseName skipwhite
+syn match   gitrebaseReset  "\v^r(eset)=>"   nextgroup=gitrebaseName skipwhite
 syn match   gitrebaseSummary ".*"               contains=gitrebaseHash contained
 syn match   gitrebaseCommand ".*"                                      contained
-syn match   gitrebaseComment "^#.*"             contains=gitrebaseHash
+syn match   gitrebaseComment "^\s*#.*"             contains=gitrebaseHash
 syn match   gitrebaseSquashError "\v%^%(s%(quash)=>|f%(ixup)=>)" nextgroup=gitrebaseCommit skipwhite
+syn match   gitrebaseMergeOption "\v-[Cc]>"  nextgroup=gitrebaseMergeCommit skipwhite contained
+syn match   gitrebaseMergeCommit "\v<\x{7,}>"  nextgroup=gitrebaseName skipwhite contained
+syn match   gitrebaseName        "\v[^[:space:].*?i:^~/-]\S+" nextgroup=gitrebaseMergeComment skipwhite contained
+syn match   gitrebaseMergeComment "#"  nextgroup=gitrebaseSummary skipwhite contained
 
 hi def link gitrebaseCommit         gitrebaseHash
 hi def link gitrebaseHash           Identifier
-hi def link gitrebasePick           Statement
-hi def link gitrebaseReword         Number
+hi def link gitrebasePick           Type
+hi def link gitrebaseReword         Conditional
 hi def link gitrebaseEdit           PreProc
-hi def link gitrebaseSquash         Type
-hi def link gitrebaseFixup          Special
-hi def link gitrebaseExec           Function
+hi def link gitrebaseSquash         Statement
+hi def link gitrebaseFixup          Repeat
+hi def link gitrebaseExec           Operator
+hi def link gitrebaseBreak          Macro
 hi def link gitrebaseDrop           Comment
+hi def link gitrebaseNoop           Comment
+hi def link gitrebaseMerge          Exception
+hi def link gitrebaseLabel          Label
+hi def link gitrebaseReset          Keyword
 hi def link gitrebaseSummary        String
 hi def link gitrebaseComment        Comment
 hi def link gitrebaseSquashError    Error
+hi def link gitrebaseMergeCommit    gitrebaseCommit
+hi def link gitrebaseMergeComment   gitrebaseComment
+hi def link gitrebaseName           Tag
 
 let b:current_syntax = "gitrebase"
diff --git a/runtime/syntax/haml.vim b/runtime/syntax/haml.vim
index 5369695..c14b88f 100644
--- a/runtime/syntax/haml.vim
+++ b/runtime/syntax/haml.vim
@@ -2,7 +2,7 @@
 " Language:	Haml
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:	*.haml
-" Last Change:	2016 Aug 29
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -38,7 +38,7 @@
 syn match   hamlSelfCloser "/" contained
 syn match   hamlClassChar "\." contained nextgroup=hamlClass
 syn match   hamlIdChar "#{\@!" contained nextgroup=hamlId
-syn match   hamlClass "\%(\w\|-\)\+" contained nextgroup=@hamlComponent
+syn match   hamlClass "\%(\w\|-\|\:\)\+" contained nextgroup=@hamlComponent
 syn match   hamlId    "\%(\w\|-\)\+" contained nextgroup=@hamlComponent
 syn region  hamlDocType start="^\s*!!!" end="$"
 
diff --git a/runtime/syntax/markdown.vim b/runtime/syntax/markdown.vim
index 1955a74..0321ca3 100644
--- a/runtime/syntax/markdown.vim
+++ b/runtime/syntax/markdown.vim
@@ -2,7 +2,7 @@
 " Language:     Markdown
 " Maintainer:   Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:    *.markdown
-" Last Change:  2016 Aug 29
+" Last Change:  2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -18,37 +18,46 @@
 if !exists('g:markdown_fenced_languages')
   let g:markdown_fenced_languages = []
 endif
+let s:done_include = {}
 for s:type in map(copy(g:markdown_fenced_languages),'matchstr(v:val,"[^=]*$")')
+  if has_key(s:done_include, matchstr(s:type,'[^.]*'))
+    continue
+  endif
   if s:type =~ '\.'
     let b:{matchstr(s:type,'[^.]*')}_subtype = matchstr(s:type,'\.\zs.*')
   endif
   exe 'syn include @markdownHighlight'.substitute(s:type,'\.','','g').' syntax/'.matchstr(s:type,'[^.]*').'.vim'
   unlet! b:current_syntax
+  let s:done_include[matchstr(s:type,'[^.]*')] = 1
 endfor
 unlet! s:type
+unlet! s:done_include
 
-syn sync minlines=10
+if !exists('g:markdown_minlines')
+  let g:markdown_minlines = 50
+endif
+execute 'syn sync minlines=' . g:markdown_minlines
 syn case ignore
 
-syn match markdownValid '[<>]\c[a-z/$!]\@!'
-syn match markdownValid '&\%(#\=\w*;\)\@!'
+syn match markdownValid '[<>]\c[a-z/$!]\@!' transparent contains=NONE
+syn match markdownValid '&\%(#\=\w*;\)\@!' transparent contains=NONE
 
 syn match markdownLineStart "^[<@]\@!" nextgroup=@markdownBlock,htmlSpecialChar
 
 syn cluster markdownBlock contains=markdownH1,markdownH2,markdownH3,markdownH4,markdownH5,markdownH6,markdownBlockquote,markdownListMarker,markdownOrderedListMarker,markdownCodeBlock,markdownRule
-syn cluster markdownInline contains=markdownLineBreak,markdownLinkText,markdownItalic,markdownBold,markdownCode,markdownEscape,@htmlTop,markdownError
+syn cluster markdownInline contains=markdownLineBreak,markdownLinkText,markdownItalic,markdownBold,markdownCode,markdownEscape,@htmlTop,markdownError,markdownValid
 
 syn match markdownH1 "^.\+\n=\+$" contained contains=@markdownInline,markdownHeadingRule,markdownAutomaticLink
 syn match markdownH2 "^.\+\n-\+$" contained contains=@markdownInline,markdownHeadingRule,markdownAutomaticLink
 
 syn match markdownHeadingRule "^[=-]\+$" contained
 
-syn region markdownH1 matchgroup=markdownHeadingDelimiter start="##\@!"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH2 matchgroup=markdownHeadingDelimiter start="###\@!"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH3 matchgroup=markdownHeadingDelimiter start="####\@!"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH4 matchgroup=markdownHeadingDelimiter start="#####\@!"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH5 matchgroup=markdownHeadingDelimiter start="######\@!"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
-syn region markdownH6 matchgroup=markdownHeadingDelimiter start="#######\@!" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH1 matchgroup=markdownH1Delimiter start="##\@!"      end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH2 matchgroup=markdownH2Delimiter start="###\@!"     end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH3 matchgroup=markdownH3Delimiter start="####\@!"    end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH4 matchgroup=markdownH4Delimiter start="#####\@!"   end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH5 matchgroup=markdownH5Delimiter start="######\@!"  end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
+syn region markdownH6 matchgroup=markdownH6Delimiter start="#######\@!" end="#*\s*$" keepend oneline contains=@markdownInline,markdownAutomaticLink contained
 
 syn match markdownBlockquote ">\%(\s\|$\)" contained nextgroup=@markdownBlock
 
@@ -70,31 +79,40 @@
 syn region markdownUrlTitle matchgroup=markdownUrlTitleDelimiter start=+'+ end=+'+ keepend contained
 syn region markdownUrlTitle matchgroup=markdownUrlTitleDelimiter start=+(+ end=+)+ keepend contained
 
-syn region markdownLinkText matchgroup=markdownLinkTextDelimiter start="!\=\[\%(\_[^]]*]\%( \=[[(]\)\)\@=" end="\]\%( \=[[(]\)\@=" nextgroup=markdownLink,markdownId skipwhite contains=@markdownInline,markdownLineStart
+syn region markdownLinkText matchgroup=markdownLinkTextDelimiter start="!\=\[\%(\%(\_[^][]\|\[\_[^][]*\]\)*]\%( \=[[(]\)\)\@=" end="\]\%( \=[[(]\)\@=" nextgroup=markdownLink,markdownId skipwhite contains=@markdownInline,markdownLineStart
 syn region markdownLink matchgroup=markdownLinkDelimiter start="(" end=")" contains=markdownUrl keepend contained
 syn region markdownId matchgroup=markdownIdDelimiter start="\[" end="\]" keepend contained
 syn region markdownAutomaticLink matchgroup=markdownUrlDelimiter start="<\%(\w\+:\|[[:alnum:]_+-]\+@\)\@=" end=">" keepend oneline
 
-let s:concealends = has('conceal') ? ' concealends' : ''
-exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\S\@<=\*\|\*\S\@=" end="\S\@<=\*\|\*\S\@=" keepend contains=markdownLineStart' . s:concealends
-exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\S\@<=_\|_\S\@=" end="\S\@<=_\|_\S\@=" keepend contains=markdownLineStart' . s:concealends
-exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" keepend contains=markdownLineStart,markdownItalic' . s:concealends
-exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\S\@<=__\|__\S\@=" end="\S\@<=__\|__\S\@=" keepend contains=markdownLineStart,markdownItalic' . s:concealends
-exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" keepend contains=markdownLineStart' . s:concealends
-exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\S\@<=___\|___\S\@=" end="\S\@<=___\|___\S\@=" keepend contains=markdownLineStart' . s:concealends
+let s:concealends = ''
+if has('conceal') && get(g:, 'markdown_syntax_conceal', 1) == 1
+  let s:concealends = ' concealends'
+endif
+exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\S\@<=\*\|\*\S\@=" end="\S\@<=\*\|\*\S\@=" skip="\\*" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownItalic matchgroup=markdownItalicDelimiter start="\w\@<!_\S\@=" end="\S\@<=_\w\@!" skip="\\_" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\S\@<=\*\*\|\*\*\S\@=" end="\S\@<=\*\*\|\*\*\S\@=" skip="\\*" contains=markdownLineStart,markdownItalic,@Spell' . s:concealends
+exe 'syn region markdownBold matchgroup=markdownBoldDelimiter start="\w\@<!__\S\@=" end="\S\@<=__\w\@!" skip="\\_" contains=markdownLineStart,markdownItalic,@Spell' . s:concealends
+exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\S\@<=\*\*\*\|\*\*\*\S\@=" end="\S\@<=\*\*\*\|\*\*\*\S\@=" skip="\\*" contains=markdownLineStart,@Spell' . s:concealends
+exe 'syn region markdownBoldItalic matchgroup=markdownBoldItalicDelimiter start="\w\@<!___\S\@=" end="\S\@<=___\w\@!" skip="\\_" contains=markdownLineStart,@Spell' . s:concealends
 
 syn region markdownCode matchgroup=markdownCodeDelimiter start="`" end="`" keepend contains=markdownLineStart
 syn region markdownCode matchgroup=markdownCodeDelimiter start="`` \=" end=" \=``" keepend contains=markdownLineStart
-syn region markdownCode matchgroup=markdownCodeDelimiter start="^\s*```.*$" end="^\s*```\ze\s*$" keepend
+syn region markdownCode matchgroup=markdownCodeDelimiter start="^\s*````*.*$" end="^\s*````*\ze\s*$" keepend
 
 syn match markdownFootnote "\[^[^\]]\+\]"
 syn match markdownFootnoteDefinition "^\[^[^\]]\+\]:"
 
 if main_syntax ==# 'markdown'
+  let s:done_include = {}
   for s:type in g:markdown_fenced_languages
-    exe 'syn region markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' matchgroup=markdownCodeDelimiter start="^\s*```\s*'.matchstr(s:type,'[^=]*').'\>.*$" end="^\s*```\ze\s*$" keepend contains=@markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g')
+    if has_key(s:done_include, matchstr(s:type,'[^.]*'))
+      continue
+    endif
+    exe 'syn region markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\..*','','').' matchgroup=markdownCodeDelimiter start="^\s*````*\s*\%({.\{-}\.\)\='.matchstr(s:type,'[^=]*').'}\=\S\@!.*$" end="^\s*````*\ze\s*$" keepend contains=@markdownHighlight'.substitute(matchstr(s:type,'[^=]*$'),'\.','','g') . s:concealends
+    let s:done_include[matchstr(s:type,'[^.]*')] = 1
   endfor
   unlet! s:type
+  unlet! s:done_include
 endif
 
 syn match markdownEscape "\\[][\\`*_{}()<>#+.!-]"
@@ -107,6 +125,12 @@
 hi def link markdownH5                    htmlH5
 hi def link markdownH6                    htmlH6
 hi def link markdownHeadingRule           markdownRule
+hi def link markdownH1Delimiter           markdownHeadingDelimiter
+hi def link markdownH2Delimiter           markdownHeadingDelimiter
+hi def link markdownH3Delimiter           markdownHeadingDelimiter
+hi def link markdownH4Delimiter           markdownHeadingDelimiter
+hi def link markdownH5Delimiter           markdownHeadingDelimiter
+hi def link markdownH6Delimiter           markdownHeadingDelimiter
 hi def link markdownHeadingDelimiter      Delimiter
 hi def link markdownOrderedListMarker     markdownListMarker
 hi def link markdownListMarker            htmlTagName
diff --git a/runtime/syntax/sass.vim b/runtime/syntax/sass.vim
index d075c87..b51a0ae 100644
--- a/runtime/syntax/sass.vim
+++ b/runtime/syntax/sass.vim
@@ -2,7 +2,7 @@
 " Language:	Sass
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:	*.sass
-" Last Change:	2016 Aug 29
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -21,8 +21,7 @@
 syn match sassProperty "^\s*\zs\s\%(\%([[:alnum:]-]\|#{[^{}]*}\)\+\s*:\|:[[:alnum:]-]\+\)"hs=s+1 contains=css.*Prop skipwhite nextgroup=sassCssAttribute
 syn match sassProperty "^\s*\zs\s\%(:\=[[:alnum:]-]\+\s*=\)"hs=s+1 contains=css.*Prop skipwhite nextgroup=sassCssAttribute
 syn match sassCssAttribute +\%("\%([^"]\|\\"\)*"\|'\%([^']\|\\'\)*'\|#{[^{}]*}\|[^{};]\)*+ contained contains=@sassCssAttributes,sassVariable,sassFunction,sassInterpolation
-syn match sassDefault "!default\>" contained
-syn match sassVariable "!\%(important\>\|default\>\)\@![[:alnum:]_-]\+"
+syn match sassFlag "!\%(default\|global\|optional\)\>" contained
 syn match sassVariable "$[[:alnum:]_-]\+"
 syn match sassVariableAssignment "\%([!$][[:alnum:]_-]\+\s*\)\@<=\%(||\)\==" nextgroup=sassCssAttribute skipwhite
 syn match sassVariableAssignment "\%([!$][[:alnum:]_-]\+\s*\)\@<=:" nextgroup=sassCssAttribute skipwhite
@@ -42,7 +41,6 @@
 syn match sassMixing "^\s\+\zs+"        nextgroup=sassMixinName
 syn match sassMixing "\%([{};]\s*\|^\s*\)\@<=@include" nextgroup=sassMixinName skipwhite
 syn match sassExtend "\%([{};]\s*\|^\s*\)\@<=@extend"
-syn match sassPlaceholder "\%([{};]\s*\|^\s*\)\@<=%"   nextgroup=sassMixinName skipwhite
 
 syn match sassFunctionName "[[:alnum:]_-]\+" contained nextgroup=sassCssAttribute
 syn match sassFunctionDecl "\%([{};]\s*\|^\s*\)\@<=@function"   nextgroup=sassFunctionName skipwhite
@@ -52,6 +50,7 @@
 syn match sassIdChar     "#[[:alnum:]_-]\@=" nextgroup=sassId
 syn match sassId         "[[:alnum:]_-]\+" contained
 syn match sassClassChar  "\.[[:alnum:]_-]\@=" nextgroup=sassClass
+syn match sassPlaceholder "\%([{};]\s*\|^\s*\)\@<=%"   nextgroup=sassClass
 syn match sassClass      "[[:alnum:]_-]\+" contained
 syn match sassAmpersand  "&"
 
@@ -75,12 +74,12 @@
 hi def link sassEndOfLineComment        sassComment
 hi def link sassCssComment              sassComment
 hi def link sassComment                 Comment
-hi def link sassDefault                 cssImportant
+hi def link sassFlag                    cssImportant
 hi def link sassVariable                Identifier
 hi def link sassFunction                Function
 hi def link sassMixing                  PreProc
 hi def link sassMixin                   PreProc
-hi def link sassPlaceholder             PreProc
+hi def link sassPlaceholder             sassClassChar
 hi def link sassExtend                  PreProc
 hi def link sassFunctionDecl            PreProc
 hi def link sassReturn                  PreProc
diff --git a/runtime/syntax/scss.vim b/runtime/syntax/scss.vim
index 6fb9691..9d79dc5 100644
--- a/runtime/syntax/scss.vim
+++ b/runtime/syntax/scss.vim
@@ -2,7 +2,7 @@
 " Language:	SCSS
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Filenames:	*.scss
-" Last Change:	2010 Jul 26
+" Last Change:	2019 Dec 05
 
 if exists("b:current_syntax")
   finish
@@ -10,10 +10,15 @@
 
 runtime! syntax/sass.vim
 
-syn match scssComment "//.*" contains=sassTodo,@Spell
-syn region scssComment start="/\*" end="\*/" contains=sassTodo,@Spell
+syn clear sassComment
+syn clear sassCssComment
+syn clear sassEndOfLineComment
 
-hi def link scssComment sassComment
+syn match scssComment "//.*" contains=sassTodo,@Spell
+syn region scssCssComment start="/\*" end="\*/" contains=sassTodo,@Spell
+
+hi def link scssCssComment scssComment
+hi def link scssComment Comment
 
 let b:current_syntax = "scss"