[css-position-3] Fix titles

Author: fantasai

css-position-3/Overview.bs

@@ -1213,7 +1213,7 @@ Auto heights for block formatting context roots</h3>
 <!-- End section: Sizing and positioning details -->
 
 <h2 id="comparison">
-Comparison of normal flow, floats, and positioning</h2>
+Informative Comparison of Normal Flow, Floats, and Positioning</h2>
 
 	<em>This section is not normative.</em>
 
@@ -1258,7 +1258,7 @@ Comparison of normal flow, floats, and positioning</h2>
 	examples given.
 
 <h3 id="comp-normal-flow">
-Normal flow</h3>
+Normal Flow Example</h3>
 
 	Consider the following CSS declarations for <em>outer</em> and <em>inner</em>
 	that do not alter the <a>normal flow</a> of boxes:
@@ -1285,7 +1285,7 @@ Normal flow</h3>
 <!-- End section: Normal flow -->
 
 <h3 id="comp-relpos">
-Relative positioning</h3>
+Relative Positioning Example</h3>
 
 	To see the effect of <a>relative positioning</a>,
 	we specify:
@@ -1327,7 +1327,7 @@ Relative positioning</h3>
 	</p>
 
 <h3 id="comp-floating">
-Floating a box</h3>
+Floating Example</h3>
 
 	Now consider the effect of <a href="https://www.w3.org/TR/CSS2/visuren.html#floats">
 	floating</a> the <em>inner</em> element’s text to the right by means of the
@@ -1415,7 +1415,7 @@ Floating a box</h3>
 	</figure>
 
 <h3 id="comp-abspos">
-Absolute positioning</h3>
+Absolute Positioning Example</h3>
 
 	Next, we consider the effect of absolute positioning. Consider the following CSS
 	declarations for <em>outer</em> and <em>inner</em>:
@@ -1547,6 +1547,7 @@ Acknowledgments</h2>
 	This module would not have been possible without input and support from many
 	helpful people. Thanks to Bert Bos, Tantek &Ccedil;elik, Anton Prowse,
 	Rossen Atanassov, Chris Jones, John Jansen, Sylvain Galineau.
+
 <!-- End section: Acknowledgments -->
 
 <!--