Sortable: Fix typo and break lines in comment.

(cherry picked from commit 06c4387)

Author: NiGhTTraX

ui/jquery.ui.sortable.js

@@ -365,12 +365,12 @@ $.widget("ui.sortable", $.ui.mouse, {
 			}
 
 			// Only put the placeholder inside the current Container, skip all
-			// items form other containers. This works because when moving
+			// items from other containers. This works because when moving
 			// an item from one container to another the
 			// currentContainer is switched before the placeholder is moved.
 			//
-			// Without this moving items in "sub-sortables" can cause the placeholder to jitter
-			// beetween the outer and inner container.
+			// Without this, moving items in "sub-sortables" can cause
+			// the placeholder to jitter beetween the outer and inner container.
 			if (item.instance !== this.currentContainer) {
 				continue;
 			}