[css-borders-4] Editorial: moved warning to partial borders section and updated changes (#12444)

* [css-borders-4] Editorial: moved warning to partial borders section and updated changes

* Update css-borders-4/Overview.bs

Co-authored-by: Sebastian Zartner <sebastianzartner@gmail.com>

* Update css-borders-4/Overview.bs

Co-authored-by: Sebastian Zartner <sebastianzartner@gmail.com>

* Update css-borders-4/Overview.bs

Co-authored-by: Sebastian Zartner <sebastianzartner@gmail.com>

* intro

* Update css-borders-4/Overview.bs

Co-authored-by: Sebastian Zartner <sebastianzartner@gmail.com>

* Update css-borders-4/Overview.bs

Co-authored-by: Sebastian Zartner <sebastianzartner@gmail.com>

---------

Co-authored-by: Sebastian Zartner <sebastianzartner@gmail.com>

Author: noamr

css-borders-4/Overview.bs

@@ -13,7 +13,6 @@ Editor: Sebastian Zartner, Invited Expert, sebastianzartner@gmail.com, w3cid 649
 Editor: Noam Rosenthal, Google, w3cid 121539
 Abstract: This module contains the features of CSS relating to the borders and decorations of boxes on the page.
 Ignored Terms: total width
-Warning: Not Ready
 </pre>
 
 <pre class="link-defaults">
@@ -33,12 +32,16 @@ spec:dom; type: dfn; text: element;
 <h2 id="intro">
 Introduction</h2>
 
-	Issue: This module is currently maintained as a diff against
-	the parts related to borders and box decorations of
-	CSS Backgrounds and Borders Module Level 3 [[CSS3BG]].
-	We will fold in the text once it’s all formatted up and in CR again,
-	as this will reduce the effort of keeping them in sync
-	(source diffs will be accurate in reflecting the differences).
+	This specification extends the parts related to borders and box decorations
+	of CSS Backgrounds and Borders Module Level 3 [[CSS3BG]].
+	It is currently a diff specification;
+	see [[CSS3BG]] for the rest of the features related to borders and box decorations.
+
+	It provides specifications for the added 'corner-*-shape' and 'border-shape' properties, as well as
+	logical shorthands for 'border-*-radius', 'box-shadow-*' longhands,
+	and partial borders via the 'border-limit' and 'border-*-clip' properties.
+
+	Issue: Merge the Level 3 text into this draft.
 
 <h2 id="borders">
 Borders</h2>
@@ -827,10 +830,20 @@ To interpolate a [=superellipse parameter=] |s| to an interpolation value betwee
 <h2 id="partial-borders">
 Partial borders</h2>
 
+<details>
+  <summary>Not Ready For Implementation</summary>
+  <p>
+    This section is not yet ready for implementation.
+    It exists in this repository to record the ideas and promote discussion.
+
+  <p>
+    Before attempting to implement anything of this section,
+    please contact the CSSWG at www-style@w3.org.
+</details>
+
 	CSS borders traditionally cover an entire border edge. Sometimes,
 	however, it can be useful to hide some parts of the border.
 
-
 	Issue: Here are two proposals for doing this:
 	the second one is from GCPM, the first one is an attempt to recast it more readably.
 	The names are terrible, known problem, proposals accepted.
@@ -1435,9 +1448,11 @@ Additions since [[CSS3BG]]</h3>
 
 	* <<image-1D>> as value for 'border-color' and its longhands
 	* added physical and logical 'border-*-radius' shorthands
-	* added 'corner-shape' and related 'corners' shorthand
+	* added 'corner-shape' and 'corner-*-shape' shorthands,
+plus related 'corners' shorthand
+	* added 'border-shape'
 	* added <a href="#partial-borders">partial borders</a> via 'border-limit' and 'border-*-clip' properties
-	* turned 'box-shadow' into a shorthand and added longhands
+	* added 'box-shadow-*' longhands and turned 'box-shadow' into a shorthand
 	* moved logical border properties from [[CSS-LOGICAL-1]] to this spec.
 
 <h2 id="acknowledgments">
@@ -1447,6 +1462,7 @@ Acknowledgments</h2>
 	and [[CSS3BG]] predecessors to this module,
 	the editors would like to thank
 	Tab Atkins,
+	Noam Rosenthal,
 	Håkon Wium Lie,
 	and Oriol Brufau
 	for their suggestions and feedback specifically for this Level 4.