[css-images-4] Update references to current shortname

Author: fantasai

css-images-4/Overview.bs

@@ -11,8 +11,8 @@ Editor: Tab Atkins Jr., Google, http://xanthir.com/contact/, w3cid 42199
 Editor: Elika J. Etemad / fantasai, Invited Expert, http://fantasai.inkedblade.net/contact, w3cid 35400
 Editor: Lea Verou, Invited Expert, http://lea.verou.me/about, w3cid 52258
 Abstract: This module contains the features of CSS level 4 relating to the <<image>> type and replaced elements.
-	It includes and extends the functionality of CSS level 2 [[CSS2]] and in the previous level of this specification [[css3-images]].
-	The main extensions compared to "CSS Images Module Level 3" [[css3-images]] are several additions to the <<image>> type, such as the ''image()'' notation, the ''element()'' notation, and conic gradients.
+	It includes and extends the functionality of CSS level 2 [[CSS2]] and in the previous level of this specification [[css-images-3]].
+	The main extensions compared to "CSS Images Module Level 3" [[css-images-3]] are several additions to the <<image>> type, such as the ''image()'' notation, the ''element()'' notation, and conic gradients.
 
 Issue Tracking: Tracker http://www.w3.org/Style/CSS/Tracker/products/27
 Previous Version: https://www.w3.org/TR/2017/WD-css-images-4-20170413/
@@ -133,7 +133,7 @@ Image File Formats {#image-file-formats}
 Image References: the ''url()'' notation {#url-notation}
 --------------------------------------------------------
 
-	Note: No change from [[css3-images]].
+	Note: No change from [[css-images-3]].
 
 
 Fetching External Images {#fetching-images}
@@ -2537,7 +2537,7 @@ Changes Since the <a href="https://www.w3.org/TR/2012/WD-css4-images-20120911/">
 - Added the <a href="#color-stop-syntax">two location syntax</a> for gradient color stops
 - Added start angles to <a href="#conic-gradients">conic gradients</a>
 - The position(s) of a color stop can now come before the color
-- Text that is identical to [[css3-images]] has been replaced with a reference to [[css3-images]].
+- Text that is identical to [[css-images-3]] has been replaced with a reference to [[css-images-3]].
 - Added the ''-webkit-image-set()'' alias.
 
 <h3 class="no-num" id="changes-3">