Add at point position hack

This should fix #22

eldoc-box.el

@@ -249,9 +249,11 @@ The coordinate is relative to the native frame.
 WINDOW nil means use selected window."
   (let* ((pos (pos-visible-in-window-p point window t))
          (x (car pos))
+         (en (frame-char-width))
          (y (cadr pos))
          (edges (window-edges window nil nil t)))
-    (cons (+ x (car edges))
+    ;; HACK: for unknown reasons we need to add en to x position
+    (cons (+ x (car edges) en)
           (+ y (cadr edges)))))
 
 (defun eldoc-box--default-at-point-position-function-1 (width height)