[css-overflow-3][editorial] Fix punctuation

Author: fantasai

css-overflow-3/Overview.bs

@@ -499,8 +499,8 @@ Overflow in Print and Other Static Media</h3>
 	such as by displaying scrollbars
 	or an ellipsis.
 
-	Note: Not all [=paged media=] is non-interactive
-	for example, e-book readers page content,
+	Note: Not all [=paged media=] is non-interactive:
+	for example, e-book readers paginate content,
 	but are interactive.
 
 <h3 id="scrollbar-layout">
@@ -708,7 +708,7 @@ Flow Relative Properties: the 'overflow-block' and 'overflow-inline' properties<
 	The mapping depends on the element's 'writing-mode'.
 
 <h3 id=smooth-scrolling caniuse=css-scroll-behavior>
-Smooth Scrolling: The 'scroll-behavior' Property</h3>
+Smooth Scrolling: the 'scroll-behavior' Property</h3>
 
 	<pre class=propdef>
 	Name: scroll-behavior