Resolve a failing test

- It passed on Org master, but failed on Org stable.
- With this commit, it should pass on stable too.

test/site/content-org/all-posts.org

@@ -2285,7 +2285,7 @@ Above is a link to an image.
 - The =width= attribute of /10%/ though must apply *only* to the
   image, and not to the link.
 - Clicking that image will open the linked image in the same browser
-  tab because of the =target​="_self"= attribute (*because of the
+  tab because of the ~target="_self"~ attribute (*because of the
   custom shortcode* --- see below).
 
 

test/site/content/posts/links-with-target-attribute.md

@@ -29,7 +29,7 @@ Above is a link to an image.
 -   The `width` attribute of _10%_ though must apply **only** to the
     image, and not to the link.
 -   Clicking that image will open the linked image in the same browser
-    tab because of the `target​="_self"` attribute (**because of the
+    tab because of the `target="_self"` attribute (**because of the
     custom shortcode** --- see below).
 
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