* spelling of WhatsApp
* use spelling of Sudoku from Wikipedia
* cite Tim Wu quote from his book *The Attention Merchants*
* since other references had sources
* Originally I wanted to use this paywalled FT
[article](https://archive.ph/tg90W), but even the article cites Wu's
book.
* other grammar fixes
Signed-off-by: Daniel Gray <dng@disroot.org>