support liberal tag names in classes

lib/mustache/context.rb

@@ -123,6 +123,11 @@ def fetch(name, default = :__raise)
     def find(obj, key, default = nil)
       hash = obj.respond_to?(:has_key?)
 
+      # If a class, we need find tags (methods) per Parser::ALLOWED_CONTENT
+      if !hash && key.to_s.include?('-')
+        key = key.to_s.gsub('-', '_')
+      end
+
       if hash && obj.has_key?(key)
         obj[key]
       elsif hash && obj.has_key?(key.to_s)

test/fixtures/liberal.mustache

@@ -0,0 +1 @@
+{{first-name}} {{middle_name!}} {{lastName?}}

test/fixtures/liberal.rb

@@ -0,0 +1,22 @@
+$LOAD_PATH.unshift File.dirname(__FILE__) + '/../lib'
+require 'mustache'
+
+class Liberal < Mustache
+  self.path = File.dirname(__FILE__)
+
+  def first_name
+    "kevin"
+  end
+
+  def middle_name!
+    'j'
+  end
+
+  def lastName?
+    'sheurs'
+  end
+end
+
+if $0 == __FILE__
+  puts Liberal.to_html
+end

test/mustache_test.rb

@@ -454,6 +454,12 @@ def test_liberal_tag_names
     assert_equal "chris j strath", Mustache.render(template, hash)
   end
 
+  def test_liberal_tag_names_in_class
+    assert_equal <<-end_liberal, Liberal.render
+kevin j sheurs
+end_liberal
+  end
+
   def test_nested_sections_same_names
     template = <<template
 {{#items}}