[css-ui-4] Bikeshed tweaks for stale links

Author: frivoal

css-ui-4/Overview.bs

@@ -793,7 +793,7 @@ Values have the following meanings:
 			(e.g. same as the ''vertical-text'' keyword)
 			over elements in a vertical [=writing mode=].
 			Additionally, User Agents may take transforms (see [[CSS-TRANSFORMS-1]])
-			or other visual effects such as text on a path (See [[SVG2#TextLayoutPath]]),
+			or other visual effects such as text on a path (See [[SVG2/text#TextLayoutPath]]),
 			when chosing between the horizontal or vertical text cursor,
 			and may display any angle of I-beam/cursor for text that is rendered at any particular angle.
 
@@ -895,7 +895,7 @@ Values have the following meanings:
 	</code></pre>
 
 	This example sets the cursor on all hyperlinks (whether visited or not)
-	to an external <a href="https://www.w3.org/TR/SVG/interact.html#CursorElement">SVG cursor</a> ([[SVG11]], section 16.8.3).
+	to an external SVG <{cursor}>.
 	User agents that don't support SVG cursors would simply skip
 	to the next value and attempt to use the "hyper.cur" cursor.
 	If that cursor format was also not supported,
@@ -1555,8 +1555,8 @@ except:
 
 For the purpose of this specification,
 an <dfn>editable element</dfn> is either
-an <a href="https://w3c.github.io/editing/contentEditable.html#dfn-editing-host">editing host</a>
-or a <a href="https://www.w3.org/TR/html/sec-forms.html#mutable">mutable</a> form control with textual content,
+an <a href="https://w3c.github.io/contentEditable/#dfn-editing-host">editing host</a>
+or a <a spec=html>mutable</a> form control with textual content,
 such as <{textarea}>.
 
 Issue: Should there be constraints