Update runtime files
diff --git a/runtime/syntax/mermaid.vim b/runtime/syntax/mermaid.vim
new file mode 100644
index 0000000..afdbcc3
--- /dev/null
+++ b/runtime/syntax/mermaid.vim
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+" Vim syntax file
+" Language: Mermaid
+" Maintainer: Craig MacEahern <https://github.com/craigmac/vim-mermaid>
+" Filenames: *.mmd
+" Last Change: 2022 Nov 22
+
+if exists("b:current_syntax")
+ finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+syntax iskeyword @,48-57,192-255,$,_,-,:
+syntax keyword mermaidKeyword
+ \ _blank
+ \ _self
+ \ _parent
+ \ _top
+ \ ::icon
+ \ accDescr
+ \ accTitle
+ \ actor
+ \ activate
+ \ alt
+ \ and
+ \ as
+ \ autonumber
+ \ branch
+ \ break
+ \ callback
+ \ checkout
+ \ class
+ \ classDef
+ \ classDiagram
+ \ click
+ \ commit
+ \ commitgitGraph
+ \ critical
+ \ dataFormat
+ \ dateFormat
+ \ deactivate
+ \ direction
+ \ element
+ \ else
+ \ end
+ \ erDiagram
+ \ flowchart
+ \ gantt
+ \ gitGraph
+ \ graph
+ \ journey
+ \ link
+ \ LR
+ \ TD
+ \ TB
+ \ RL
+ \ loop
+ \ merge
+ \ mindmap root
+ \ Note
+ \ Note right of
+ \ Note left of
+ \ Note over
+ \ note
+ \ note right of
+ \ note left of
+ \ note over
+ \ opt
+ \ option
+ \ par
+ \ participant
+ \ pie
+ \ rect
+ \ requirement
+ \ rgb
+ \ section
+ \ sequenceDiagram
+ \ state
+ \ stateDiagram
+ \ stateDiagram-v2
+ \ style
+ \ subgraph
+ \ title
+highlight link mermaidKeyword Keyword
+
+syntax match mermaidStatement "|"
+syntax match mermaidStatement "--\?[>x)]>\?+\?-\?"
+syntax match mermaidStatement "\~\~\~"
+syntax match mermaidStatement "--"
+syntax match mermaidStatement "---"
+syntax match mermaidStatement "-->"
+syntax match mermaidStatement "-\."
+syntax match mermaidStatement "\.->"
+syntax match mermaidStatement "-\.-"
+syntax match mermaidStatement "-\.\.-"
+syntax match mermaidStatement "-\.\.\.-"
+syntax match mermaidStatement "=="
+syntax match mermaidStatement "==>"
+syntax match mermaidStatement "===>"
+syntax match mermaidStatement "====>"
+syntax match mermaidStatement "&"
+syntax match mermaidStatement "--o"
+syntax match mermaidStatement "--x"
+syntax match mermaidStatement "x--x"
+syntax match mermaidStatement "-----"
+syntax match mermaidStatement "---->"
+syntax match mermaidStatement "==="
+syntax match mermaidStatement "===="
+syntax match mermaidStatement "====="
+syntax match mermaidStatement ":::"
+syntax match mermaidStatement "<|--"
+syntax match mermaidStatement "\*--"
+syntax match mermaidStatement "o--"
+syntax match mermaidStatement "o--o"
+syntax match mermaidStatement "<--"
+syntax match mermaidStatement "<-->"
+syntax match mermaidStatement "\.\."
+syntax match mermaidStatement "<\.\."
+syntax match mermaidStatement "<|\.\."
+syntax match mermaidStatement "--|>"
+syntax match mermaidStatement "--\*"
+syntax match mermaidStatement "--o"
+syntax match mermaidStatement "\.\.>"
+syntax match mermaidStatement "\.\.|>"
+syntax match mermaidStatement "<|--|>"
+syntax match mermaidStatement "||--o{"
+highlight link mermaidStatement Statement
+
+syntax match mermaidIdentifier "[\+-]\?\w\+(.*)[\$\*]\?"
+highlight link mermaidIdentifier Identifier
+
+syntax match mermaidType "[\+-\#\~]\?\cint\>"
+syntax match mermaidType "[\+-\#\~]\?\cString\>"
+syntax match mermaidType "[\+-\#\~]\?\cbool\>"
+syntax match mermaidType "[\+-\#\~]\?\cBigDecimal\>"
+syntax match mermaidType "[\+-\#\~]\?\cList\~.\+\~"
+syntax match mermaidType "<<\w\+>>"
+highlight link mermaidType Type
+
+syntax match mermaidComment "%%.*$"
+highlight link mermaidComment Comment
+
+syntax region mermaidDirective start="%%{" end="\}%%"
+highlight link mermaidDirective PreProc
+
+syntax region mermaidString start=/"/ skip=/\\"/ end=/"/
+highlight link mermaidString String
+
+let b:current_syntax = "mermaid"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+
+" vim:set sw=2: