ljust(str, integer, padstr=' ')
public

Works just like String#ljust, only integer specifies characters instead of bytes.

Example:

  "¾ cup".chars.rjust(8).to_s
  #=> "¾ cup   "

  "¾ cup".chars.rjust(8, " ").to_s # Use non-breaking whitespace
  #=> "¾ cup   "