Putting two spaces after a period. Even though every reference written after 1995 says that it's now one space after a period, your 60-year-old CEO still insists that when he was walking uphill, barefoot, in the snow, with one typewriter under each arm, his secretary put two spaces after a period and, dammit, you will, too, as long as you work here.
My soul dies just a little more every time I put that second space after a period, but the boss says we have to use the Boomer space.
My soul dies just a little more every time I put that second space after a period, but the boss says we have to use the Boomer space.{space}{space}