[css-position-3][editorial] Add note, adjust punctuation

Author: fantasai

css-position-3/Overview.bs

@@ -699,7 +699,7 @@ Absolute (and Fixed) Positioning</h3>
 	can also be called the <dfn export>absolute-position containing block</dfn>.)
 
 <h4 id="resolving-insets">
-Resolvings Insets: the “Inset-Modified Containing Block”</h4>
+Resolvings Insets for the “Inset-Modified Containing Block”</h4>
 
 	If only one [=inset property=] in a given axis is ''top/auto'',
 	it is set to zero.
@@ -905,7 +905,7 @@ Absolute Positioning Layout Model</h2>
 			as defined by its [=self-alignment properties=].
 
 			For this purpose, if neither ''<overflow-position>/safe'' nor ''<overflow-position>/unsafe'' is specified,
-			the box aligns at an "in-between" level of safety:
+			the box aligns at an “in-between” level of safety:
 			it is ''unsafe''-aligned within its [=inset-modified containing block=],
 			but shifted, if necessary, to not overflow
 			the union of its [=original containing block=] and its [=inset-modified containing block=]--
@@ -971,6 +971,10 @@ Auto Margins of Absolutely-Positioned Boxes</h3>
 	the [=inline-start|start=] margin resolves to zero
 	and the [=inline-end|end=] margin receives the <var>remaining space</var>.
 
+	Note: Unlike typical [=in-flow=] layout,
+	the space distributed to ''margin/auto'' [=margins=]
+	can be negative in [=absolute positioning=].
+
 <h2 id="abspos-old">
 Old Absolute Positioning Layout Model</h2>
 
@@ -1700,6 +1704,13 @@ Acknowledgments</h2>
 
 <h2 class="no-num" id="changes">Changes</h2>
 
+	The following significant changes were made since the
+	<a href="https://www.w3.org/TR/2024/WD-css-position-3-20240810/">10 August 2024 Working Draft</a>:
+	<ul>
+		<li>None. Editorial updates only (as of 10 March 2025).
+	</ul>
+
+
 	The following significant changes were made since the
 	<a href="https://www.w3.org/TR/2023/WD-css-position-3-20230403/">3 April 2023 Working Draft</a>:
 	<ul>