How to escape colon in the '&' macro in strformat ?

[stbalbach]

The point of the curly brackets is to embed Nim code (not to "embed 
variables"), it can be anything. I happen to have Nim code that has quote marks 
in it, but it won't compile for anyone here. Since this is an "example", and 
rather then generate some fake Nim code, I demonstrated the issue simply and 
easily with a string. I appreciate the answer by shirleyquirk, this is what I 
was looking for.