Update runtime files.
diff --git a/runtime/syntax/hgcommit.vim b/runtime/syntax/hgcommit.vim
new file mode 100644
index 0000000..e4c8b6e
--- /dev/null
+++ b/runtime/syntax/hgcommit.vim
@@ -0,0 +1,27 @@
+" Vim syntax file
+" Language: hg (Mercurial) commit file
+" Maintainer: Ken Takata <kentkt at csc dot jp>
+" Last Change: 2012 Aug 2
+" Filenames: hg-editor-*.txt
+" License: VIM License
+" URL: https://github.com/k-takata/hg-vim
+
+if exists("b:current_syntax")
+ finish
+endif
+
+syn match hgcommitComment "^HG:.*$"
+syn match hgcommitUser "^HG: user: \zs.*$" contained containedin=hgcommitComment
+syn match hgcommitBranch "^HG: branch \zs.*$" contained containedin=hgcommitComment
+syn match hgcommitAdded "^HG: \zsadded .*$" contained containedin=hgcommitComment
+syn match hgcommitChanged "^HG: \zschanged .*$" contained containedin=hgcommitComment
+syn match hgcommitRemoved "^HG: \zsremoved .*$" contained containedin=hgcommitComment
+
+hi def link hgcommitComment Comment
+hi def link hgcommitUser String
+hi def link hgcommitBranch String
+hi def link hgcommitAdded Identifier
+hi def link hgcommitChanged Special
+hi def link hgcommitRemoved Constant
+
+let b:current_syntax = "hgcommit"