Add API example generator via tent-apidoc

lib/api_example.rb

@@ -0,0 +1,16 @@
+require 'tent-apidoc'
+
+class ApiExampleFilter < Nanoc::Filter
+  identifier :api_example
+  type :text
+
+  def run(content, params={})
+    content.gsub(/\{(\w+) example\}/) { api_example($1) }
+  end
+
+  private
+
+  def api_example(id)
+    TentApiDoc.examples[id.to_sym]
+  end
+end