re-add test for Puppet 3 function

lib/puppet-strings/markdown/base.rb

@@ -58,8 +58,9 @@ module PuppetStrings::Markdown
     { :return_val => 'return',
       :since => 'since',
       :summary => 'summary' }.each do |method_name, tag_name|
+      # @return [String] unless the tag is nil or the string.length == 0
       define_method method_name do
-        @tags.select { |tag| tag[:tag_name] == "#{tag_name}" }[0][:text] unless @tags.select { |tag| tag[:tag_name] == "#{tag_name}" }[0].nil?
+        @tags.select { |tag| tag[:tag_name] == "#{tag_name}" }[0][:text] unless @tags.select { |tag| tag[:tag_name] == "#{tag_name}" }[0].nil? || @tags.select { |tag| tag[:tag_name] == "#{tag_name}" }[0][:text].length.zero?
       end
     end
 

lib/puppet-strings/markdown/templates/function.erb

@@ -8,8 +8,8 @@ Type: <%= type %>
 <%= sig.text %>
 
 <% end -%>
-<% if sig.return_val -%>
-Returns: `<%= sig.return_type %>` <%= sig.return_val %>
+<% if sig.return_type -%>
+Returns: `<%= sig.return_type %>`<% if sig.return_val %> <%= sig.return_val %><% end %>
 
 <% end -%>
 <% if raises -%>

spec/fixtures/unit/markdown/output.md

@@ -9,6 +9,7 @@
 * [`database`](#database): An example database server type.
 ## Functions
 * [`func`](#func): A simple Puppet function.
+* [`func3x`](#func3x): Documentation for an example 3.x function.
 * [`func4x`](#func4x): An example 4.x function.
 * [`func4x_1`](#func4x_1): An example 4.x function with only one signature.
 ## Classes
@@ -279,6 +280,27 @@ Options:
 
 * **:param3opt** `Array`: Something about this option
 
+### func3x
+Type: Ruby 3.x API
+
+#### `func3x(String $param1, Integer $param2)`
+
+Documentation for an example 3.x function.
+
+Returns: `Undef`
+
+##### `param1`
+
+Data type: `String`
+
+The first parameter.
+
+##### `param2`
+
+Data type: `Integer`
+
+The second parameter.
+
 ### func4x
 Type: Ruby 4.x API
 

spec/unit/puppet-strings/markdown_spec.rb

@@ -111,6 +111,19 @@ Puppet::Functions.create_function(:func4x_1) do
   end
 end
 
+# An example 3.x function
+Puppet::Parser::Functions.newfunction(:func3x, doc: <<-DOC
+ Documentation for an example 3.x function.
+ @param param1 [String] The first parameter.
+ @param param2 [Integer] The second parameter.
+ @return [Undef]
+ @example Calling the function.
+   func3x('hi', 10)
+ DOC
+ ) do |*args|
+   #...
+end
+
 Puppet::Type.type(:database).provide :linux do
   desc 'An example provider on Linux.'
   confine kernel: 'Linux'