Preserve source location of the tag helpers

kaminari-core/lib/kaminari/helpers/paginator.rb

@@ -68,7 +68,7 @@ module Kaminari
       end
 
       %w[first_page prev_page next_page last_page gap].each do |tag|
-        eval <<-DEF
+        eval <<-DEF, nil, __FILE__, __LINE__ + 1
           def #{tag}_tag
             @last = #{tag.classify}.new @template, @options
           end