[css-scroll-snap-1] Add e.g. to parenthetical with non-exhaustive list of examples.

Author: fantasai

css-scroll-snap-1/Overview.bs

@@ -971,7 +971,7 @@ Choosing Snap Positions {#choosing}
         must always ignore the starting <a>snap positions</a>.)
 
     * If a page is navigated to a fragment that defines a target element
-        (one that would be matched by '':target'',
+        (e.g. one that would be matched by '':target'',
         or the target of {{Element/scrollIntoView()}}),
         and that element defines some <a>snap positions</a>,
         the user agent must <a>snap</a> to one of that element’s <a>snap positions</a>