tasks/lint.rake in activeadmin-1.0.0 vs tasks/lint.rake in activeadmin-1.1.0

@@ -1,8 +1,21 @@
 desc "Lints ActiveAdmin code base"
-task lint: "lint:rubocop"
+task lint: ["lint:rubocop", "lint:mdl"]
 
 namespace :lint do
   require "rubocop/rake_task"
   desc "Checks ruby code style with RuboCop"
   RuboCop::RakeTask.new
+
+  desc "Checks markdown code style with Markdownlint"
+  task :mdl do
+    puts "Running mdl..."
+
+    targets = [
+      *Dir.glob("docs/**/*.md"),
+      "CONTRIBUTING.md",
+      ".github/ISSUE_TEMPLATE.md"
+    ]
+
+    abort unless system("mdl", *targets)
+  end
 end