Fix ATAG report formatting

Author: thibaudcolas

audits/atag/atag_wagtail_5.1.md

@@ -284,7 +284,7 @@ Reference: [RFC 51: Contextual alt text](https://github.com/wagtail/rfcs/pull/51
 
 **Fail**. Wagtail’s only time-based media is animated GIFs. Their text alternatives work identically to other images in Wagtail, with the same characteristics listed in SC A.2.1.1.
 
-#### [A.2.2. (For the authoring tool user interface) Ensure that editing-view presentation can be programmatically determined](https://www.w3.org/TR/
+#### [A.2.2. (For the authoring tool user interface) Ensure that editing-view presentation can be programmatically determined](https://www.w3.org/TR/#gl_a22)
 
 See [Implementing A.2.2](http://www.w3.org/TR/2015/NOTE-IMPLEMENTING-ATAG20-20150924/#gl_a22).
 
@@ -537,7 +537,7 @@ The following settings are persistent for a given browser, across all sessions w
 
 **Pass**. Wagtail’s language, time zone, and theme settings default to respecting platform settings until set to a specific value by the user.
 
-#### [A.3.7. (For the authoring tool user interface) Ensure that previews are at least as accessible as in-market user agents](https://www.w3.org/TR/
+#### [A.3.7. (For the authoring tool user interface) Ensure that previews are at least as accessible as in-market user agents](https://www.w3.org/TR/#gl_a37)
 
 See [Implementing A.3.7](http://www.w3.org/TR/2015/NOTE-IMPLEMENTING-ATAG20-20150924/#gl_a37).
 
@@ -600,7 +600,7 @@ Recommendation for Wagtail:
 
 **Pass**. Reversible plain text and rich text content changes can be reversed sequentially while the user remains on the page. Content supporting revisions can be restored at any point in the content’s history.
 
-#### [A.4.2. (For the authoring tool user interface) Document the user interface, including all accessibility features](https://www.w3.org/TR/ATAG20/
+#### [A.4.2. (For the authoring tool user interface) Document the user interface, including all accessibility features](https://www.w3.org/TR/ATAG20/#gl_a42)
 
 See [Implementing A.4.2](http://www.w3.org/TR/2015/NOTE-IMPLEMENTING-ATAG20-20150924/#gl_a42).