fix: Remove special characters from placeholders

[daogrady]

Fixes #135

I considered making them conditionally empty, but empty strings will also fail the validation process. So this seems to be the least invasive approach.

[daogrady]

@tim-sh I can continue to work on the failing tests if you are okay with the general solution, as adjusting the expected format to the actual wording we choose requires a bit of manual labor, and I'd like to not have to do that too many times, in case we decide on a different output. :)

[tim-sh]

@tim-sh I can continue to work on the failing tests if you are okay with the general solution, as adjusting the expected format to the actual wording we choose requires a bit of manual labor, and I'd like to not have to do that too many times, in case we decide on a different output. :)

Looks good to me. The additional text makes the @ obsolete and the ellipsees are anyway. As long as we don't find a lot of places where we need such special chars, I'm fine with the solution. 👍