Move position of "at-point" popup to the left

This way the childframe is still under the point when
the cursor type is bar

eldoc-box.el

@@ -220,7 +220,7 @@ Position is calculated base on WIDTH and HEIGHT of chilframe text window"
               ;; space on the right of the pos is not enough
               ;; put to left
               (max 0 (- x width))
-            (+ x en))
+            x)
           (if (< (- (frame-inner-height) height) y)
               ;; space under the pos is not enough
               ;; put above