def find_file(name, version=@version)
      if name =~ /^\//
        @wiki.file(name[1..-1], version)
      else
        path = @dir == '.' ? name : ::File.join(@dir, name)
        @wiki.file(path, version)
      end
    end
def find_file(name, version=@version)
      if name =~ /^\//
        @wiki.file(name[1..-1], version)
      else
        path = @dir == '.' ? name : ::File.join(@dir, name)
        @wiki.file(path, version)
      end
    end
Find the given file in the repo.

 name - The String absolute or relative path of the file.

 Returns the Gollum::File or nil if none was found.