attempted at all, for any page, it can instead return an
IkiWiki::ErrorReason object explaining why.
-When constructing these objects, you should also include a list of any
-pages whose contents or other metadata influenced the result of the match.
-For example, "backlink(foo)" is influenced by the contents of page foo;
+When constructing these objects, you should also include information about
+of any pages whose contents or other metadata influenced the result of the
+match. For example, "backlink(foo)" is influenced by the contents of page foo;
"link(foo)" and "title(bar)" are influenced by the contents of any
page they match; "created_before(foo)" is influenced by the metadata of
foo; while "glob(*)" is not influenced by the contents of any page.