minor renovations, beautify round 2 (final)

2-ui/3-event-details/3-mousemove-mouseover-mouseout-mouseenter-mouseleave/2-hoverintent/task.md

@@ -24,7 +24,7 @@ tooltip.innerHTML = "Подсказка";
 
 // при "наведении на элемент" показать подсказку
 new HoverIntent({
-  elem: elem, 
+  elem: elem,
   over: function() {
     tooltip.style.left = this.getBoundingClientRect().left + 'px';
     tooltip.style.top = this.getBoundingClientRect().bottom + 5 + 'px';

2-ui/3-event-details/3-mousemove-mouseover-mouseout-mouseenter-mouseleave/article.md

@@ -161,12 +161,12 @@
 
 ```js
 table.onmouseover = function(event) {
-  var target = event.target; 
+  var target = event.target;
   target.style.background = 'pink';
 };
 
 table.onmouseout = function(event) {
-  var target = event.target; 
+  var target = event.target;
   target.style.background = '';
 };
 ```