Fixed JSHint notices

Author: vovayatsyuk

lib/web/mage/sticky.js

@@ -51,9 +51,9 @@ define([
             isStatic = this.element.css('position') === 'static';
 
             if (!isStatic && this.element.is(':visible')) {
-                offset = $(document).scrollTop()
-                    - this.parentOffset
-                    + this._getOptionValue('spacingTop');
+                offset = $(document).scrollTop() -
+                    this.parentOffset +
+                    this._getOptionValue('spacingTop');
 
                 offset = Math.max(0, Math.min(offset, this.maxOffset));