Inconsistent Style

[gluecia]

Great tutorial, however there are quite a few style issues I see.
For example:

On step 43, you add variables for the cursor's X and Y

struct editorConfig {
    int cx, cy;
    int screenrows;
    int screencols;
    . . .
}

If you put cx and cy on the same line for variable declaration, it's a good idea to also put screenrows and screencols on the same line, and you might even consider pulling all four of them on the same line.