Update runtime files.
diff --git a/runtime/compiler/dartfmt.vim b/runtime/compiler/dartfmt.vim
new file mode 100644
index 0000000..2e4ab02
--- /dev/null
+++ b/runtime/compiler/dartfmt.vim
@@ -0,0 +1,25 @@
+" Vim compiler file
+" Compiler: Dart Formatter
+" Maintainer: Doug Kearns <dougkearns@gmail.com>
+" Last Change: 2019 May 08
+
+if exists("current_compiler")
+ finish
+endif
+let current_compiler = "dartfmt"
+
+if exists(":CompilerSet") != 2 " older Vim always used :setlocal
+ command -nargs=* CompilerSet setlocal <args>
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+CompilerSet makeprg=dartfmt
+CompilerSet errorformat=%Eline\ %l\\,\ column\ %c\ of\ %f:\ %m,
+ \%Z\ %\\{3}│\ %\\+^%\\+,
+ \%C%.%#,
+ \%-G%.%#
+
+let &cpo = s:cpo_save
+unlet s:cpo_save