{{msg-mantis|S reminder sent to|notext=yes}}

I think name of reminder target should be passed as parameter, not glued by software to avoid grammar issues.

 Done

The original message doesn't seem to have been changed (no parameter appears). Is it a $1 after the colon?

The original message has changed. The hard coded colon in the code has moved to the message. No parameter with a comma separated list of usernames was added, if *that* is what you expected.

Ohhhhhh, I see :-) Got it. Thanks.