Update article.md

'sideway' -> 'side way'

Author: paroche

Diff for: 2-ui/1-document/08-styles-and-classes/article.md

@@ -282,7 +282,7 @@ Visited links may be colored using `:visited` CSS pseudoclass.
 
 But `getComputedStyle` does not give access to that color, because otherwise an arbitrary page could find out whether the user visited a link by creating it on the page and checking the styles.
 
-JavaScript may not see the styles applied by `:visited`. And also, there's a limitation in CSS that forbids applying geometry-changing styles in `:visited`. That's to guarantee that there's no sideway for an evil page to test if a link was visited and hence to break the privacy.
+JavaScript may not see the styles applied by `:visited`. And also, there's a limitation in CSS that forbids applying geometry-changing styles in `:visited`. That's to guarantee that there's no side way for an evil page to test if a link was visited and hence to break the privacy.
 ```
 
 ## Summary