Remove unused dup. Let inject split hash for us

lib/rabl-rails/library.rb

@@ -21,7 +21,6 @@ module RablRails
     def compile_template_from_source(source, path = nil)
       if path && RablRails.cache_templates?
         @cached_templates[path] ||= Compiler.new.compile_source(source)
-        @cached_templates[path].dup
       else
         Compiler.new.compile_source(source)
       end

lib/rabl-rails/renderers/base.rb

@@ -48,8 +48,7 @@ module RablRails
       # template source passed.
       #
       def render_resource(data, source)
-        source.inject({}) { |output, current|
-          key, value = current
+        source.inject({}) { |output, (key, value)|
 
           out = case value
           when Symbol