You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ascii_charts.rb
    path of file: ./repos/kovid/lib/kovid
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

# Copyright (c) 2011 Ben Lund

#
    
      def round_value(val)
        remainder = val % step_size
        unprecised = if (remainder * 2) >= step_size
                       (val - remainder) + step_size
                     else
                       val - remainder
                      end