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+Functions
+=========
+
+Define functions in this directory.
+
+File paths should match the function name; for example, a function
+`myfunction`, defined like this:
+
+    Puppet::Parser::Functions::newfunction(
+        :myfunction,
+        :type => :statement,
+        :doc => "Documentation here."
+    ) do |vals|
+        # ...
+    end
+
+Should be found in `myfunction.rb` in this directory.