Getting to know the finer points of grammar and punctuation

This revelation is not in relation to their content. We all knew that. It’s something else — the punctuation.
It’s one of those things I thought I knew it all about and an example of a little knowledge can be a dangerous thing. It would nearly be better to leave the punctuation out completely like in a text from your mother: “hope u are having a lovely time go easy on the drink ur father has a cold”.