Original sentence: With the presence of an extra mention of both Passover and Sukkot, both could be used to determine an equivalent period of time -- comparing Shavuot to Passover would yield a seven day period, while comparing it to Sukkot would yield an eight day period, and there is nothing pressing one choice over another
Edited sentence: With the presence of an extra mention of both Passover and Sukkot, both could be used to determine an equivalent period of time—comparing Shavuot to Passover would yield a seven day period, while comparing it to Sukkot would yield an eight day period, and there is nothing pressing one choice over another