Stop the artwork address module calling absent what the file beside it holds

src/artwork/address.rs

@@ -15,10 +15,18 @@
 //! cache key 0041 builds. Nothing here fetches anything: the transport is #27
 //! and does not exist, so no call in this module reaches a network.
 //!
-//! What an item with no image of a kind answers with is #51 and is deliberately
-//! absent. The rule here is narrower and is the half that belongs to addressing:
-//! a tag is a required input, so an item carrying none for a kind produces no
-//! address at all rather than an address with an empty tag in it.
+//! The rule here is the half that belongs to addressing: a tag is a required
+//! input, so an item carrying none for a kind produces no address at all rather
+//! than an address with an empty tag in it.
+//!
+//! THAT SENTENCE SAID WHAT SUCH AN ITEM ANSWERS WITH WAS #51 AND DELIBERATELY
+//! ABSENT, AND THE FILE BESIDE THIS ONE IS THAT ANSWER.
+//! [`crate::artwork::presence`] says of itself that it is the value 0049 stops
+//! one step short of, it is built out of this module's own types rather than
+//! standing beside them, and it landed the day after the sentence. The
+//! directory's own header names it in the paragraph below the one about this
+//! module, so this file has been the only one in `src/artwork/` calling that
+//! answer absent. #477 is where it was found.
 
 use crate::cache::EntryKey;
 use crate::cache::key::{KeySpace, Parameter, RequestKey};