class RSpec::Support::ObjectFormatter

def truncate_string(str, start_index, end_index)

codes to the terminal can lead to corruption
will be removed as printing partial ANSI
If the string ends with a partial ANSI code code then that
Returns the substring defined by the start_index and end_index 
def truncate_string(str, start_index, end_index)
  cut_str = str[start_index..end_index]
  # ANSI color codes are like: \e[33m so anything with \e[ and a
  # number without a 'm' is an incomplete color code
  cut_str.sub(/\e\[\d+$/, '')
end