Compiler generated assertion error message

[Walter Bright via Digitalmars-d]

On 6/19/2014 10:44 AM, safety0ff wrote:
> A year and a half ago Andrej Mitrovic created a DMD pull ([1]) which implements
> dmd adding a prefix string containing the failing assertion to the assertion
> error's "msg" field.

It appears to do more than that, such as always adding the assertion expression 
to the output?