Print why assert failed?

[lscrd]

You may put anything in the message, for instance the value of the arguments:
    
    
    import strformat
    
    let a = 1
    let b = 2
    
    assert a == b, &"Expected {b}, got {a}"
    
    Run

Of course, displaying the arguments by default would be an improvement but, 
most of the time, only the user knows what is the relevant information to 
display.