Add spaces (and punctuation?) in a few chat messages

[CoconutMacaroon]

What problem has occurred? What issues has it caused?

To my knowledge, it hasn't actually caused any issues, it's just a typo, but something "is wrong on the internet" (Duty Calls from XKCD licensed under CC BY-NC 2.5)

• https://chat.stackexchange.com/transcript/message/67005415 - "isprimarily"
• https://chat.stackexchange.com/transcript/message/67011584 - needs space before "The regex"

What would you like to happen/not happen?

The text "isprimarily" should be changed to "is primarily". Also, a period character followed by a space should be added before the text "The regex".

It's super minor, so I'll probably look at this eventually if nobody else does.