don't want to update revision while updating field by code in sitecore c# code example

Example: don't want to update revision while updating field by code in sitecore c#

bool silent = true;
bool updateStatistics = false;

using (SecurityDisabler disabler = new SecurityDisabler())
{
    using (new EditContext(item, updateStatistics, silent))
    {
        item["ShortHeadline"] = item["Title"];    
    }
}