parse_unquoted_column_value

# File lib/csv/parser.rb, line 923
    def parse_unquoted_column_value
      value = @scanner.scan_all(@unquoted_value)
      return nil unless value

      @unquoted_column_value = true
      if @first_column_separators
        while true
          @scanner.keep_start
          is_column_end = @column_ends.all? do |column_end|
            @scanner.scan(column_end)
          end
          @scanner.keep_back
          break if is_column_end
          sub_separator = @scanner.scan_all(@first_column_separators)
          break if sub_separator.nil?
          value << sub_separator
          sub_value = @scanner.scan_all(@unquoted_value)
          break if sub_value.nil?
          value << sub_value
        end
      end
      value.gsub!(@backslash_quote_character, @quote_character) if @backslash_quote
      value
    end