refactor/reformat Tooltip.getPosition per @fat's feedback

js/tooltip.js

@@ -316,16 +316,20 @@
 
   Tooltip.prototype.getPosition = function ($element) {
     $element   = $element || this.$element
+
     var el     = $element[0]
     var isBody = el.tagName == 'BODY'
-    var isSvg = window.SVGElement && el instanceof window.SVGElement
+    var isSvg  = window.SVGElement && el instanceof window.SVGElement
+
+    var elRect    = typeof el.getBoundingClientRect == 'function' ? el.getBoundingClientRect() : null
+    var elOffset  = isBody ? { top: 0, left: 0 } : $element.offset()
+    var scroll    = { scroll: isBody ? document.documentElement.scrollTop || document.body.scrollTop : $element.scrollTop() }
     var outerDims = isSvg ? {} : {
       width:  isBody ? $(window).width()  : $element.outerWidth(),
       height: isBody ? $(window).height() : $element.outerHeight()
     }
-    return $.extend({}, (typeof el.getBoundingClientRect == 'function') ? el.getBoundingClientRect() : null, {
-      scroll: isBody ? document.documentElement.scrollTop || document.body.scrollTop : $element.scrollTop()
-    }, outerDims, isBody ? { top: 0, left: 0 } : $element.offset())
+
+    return $.extend({}, elRect, scroll, outerDims, elOffset)
   }
 
   Tooltip.prototype.getCalculatedOffset = function (placement, pos, actualWidth, actualHeight) {