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

[kaushalmodi]

@lscrd That doesn't compile for me.

@stbalbach Also, why do you have a literal string inside the curly braces. I 
have only seen variable names followed by colon and formatting options within 
the braces.

For example, I don't see the need of braces or `&` in your example. But if you 
remove the braces, it works:
    
    
    import strformat
    echo &""""url = http://example.com"""";
    
    
    Run

Can you show something close to the actual example where you needed a literal 
string with : within braces within the `&` macro?