Force write to write to console

[Brother Bill via Digitalmars-d-learn]

```
write("foo"); // writes to the console, but it doesn't display 
yet.
writeln;      // Now it displays, with a new line.
```
How to force writing to the console after ```write("foo");```

I am doing this for a tutorial video, and want the 
```write("foo");```
to immediately write to the console.