[css-rhythm-1][editorial] Fixed Bikeshed issues

Author: SebastianZ

css-rhythm-1/Overview.bs

@@ -53,7 +53,7 @@ Introduction {#intro}
 
 	<figure>
 		<a href="examples/snap-height.html">
-			<img src="images/snap-height-sample.png"></a>
+			<img src="images/snap-height-sample.png" width="432" height="164" alt=""></a>
 		<figcaption>Vertical rhythm kept through pictures and different size of text in a multi-column document.</figcaption>
 	</figure>
 
@@ -136,17 +136,15 @@ Adjusting Block-level Box Heights {#block-height}
 	to maintain a continuous rhythm.
 
 		<figure>
-			<img src="images/block-step-size-before.png"
-			width="500">
+			<img src="images/block-step-size-before.png" width="500" height="349" alt="">
 			<figcaption>Heads and blockquotes have varying font sizes and line heights,
 			resulting in uneven text across columns.</figcaption>
 		</figure>
 
 
 
 		<figure>
-			<img src="images/block-step-size-after.png"
-			width="500">
+			<img src="images/block-step-size-after.png" width="500" height="348" alt="">
 			<figcaption>Space inserted before and after blocks (shown with colored borders)
 			restores vertical rhythm.</figcaption>
 		</figure>
@@ -417,16 +415,16 @@ by making heights of all lines an integer multiple of the <a>step unit</a>.
 	except values that align relative to the line box.
 
 	<figure>
-	<img src="images/adjust-line-height.svg">
-	<figcaption>Rounding up the computed line box height.</figcaption>
+		<img src="images/adjust-line-height.svg" width="376" height="145" alt="">
+		<figcaption>Rounding up the computed line box height.</figcaption>
 	</figure>
 
 	<div class="issue">Should this be animatable?
 	There doesn't seem to be use cases but needed for consistency?</div>
 
 	<div class="example">
 		<figure style="float:right">
-			<img src="images/line-grid-center.svg" height="300">
+			<img src="images/line-grid-center.svg" width="61" height="176" alt="">
 		</figure>
 
 		In the following example,
@@ -513,11 +511,15 @@ Notes on Block-level Boxes {#inline-block}
 	</div>
 -->
 
-Privacy and Security Considerations {#priv-sec}
+Privacy Considerations {#privacy}
 ===============================================
 
-	This specification introduces no new privacy leaks,
-	or security considerations beyond "implement it correctly".
+	This specification introduces no new privacy leaks beyond "implement it correctly".
+
+Security Considerations {#security}
+===============================================
+
+	This specification introduces no new security considerations beyond "implement it correctly".
 
 Acknowledgments {#acks}
 =======================