Move struct Document inside mod document

I expect there will be other document-level types soon.

src/document/mod.rs

@@ -0,0 +1,4 @@
+//! Describes the top-level document structure.
+
+mod document;
+pub use document::Document;

src/lib.rs

@@ -7,8 +7,7 @@
 
 pub mod blocks;
 
-mod document;
-pub use document::Document;
+pub mod document;
 
 mod error;
 pub use error::{Error, ParseResult};

src/tests/asciidoc_lang/root/document_structure.rs

@@ -15,11 +15,12 @@ mod documents {
     use pretty_assertions_sorted::assert_eq;
 
     use crate::{
+        document::Document,
         tests::fixtures::{
             blocks::{TBlock, TSimpleBlock},
-            TDocument, TSpan,
+            document::TDocument,
+            TSpan,
         },
-        Document,
     };
 
     #[test]

src/tests/document.rs → src/tests/document/document.rs

@@ -1,11 +1,12 @@
 use pretty_assertions_sorted::assert_eq;
 
 use crate::{
+    document::Document,
     tests::fixtures::{
         blocks::{TBlock, TSimpleBlock},
-        TDocument, TSpan,
+        document::TDocument,
+        TSpan,
     },
-    Document,
 };
 
 #[test]

src/tests/document/mod.rs

@@ -0,0 +1 @@
+mod document;

src/tests/fixtures/document.rs → src/tests/fixtures/document/document.rs

@@ -1,8 +1,8 @@
 use std::{cmp::PartialEq, fmt};
 
 use crate::{
+    document::Document,
     tests::fixtures::{blocks::TBlock, TSpan},
-    Document,
 };
 
 // Approximate mock of Document type that we can use

src/tests/fixtures/document/mod.rs

@@ -0,0 +1,2 @@
+mod document;
+pub(crate) use document::TDocument;

src/tests/fixtures/mod.rs

@@ -1,9 +1,7 @@
 use std::{env, path::PathBuf};
 
 pub(crate) mod blocks;
-
-mod document;
-pub(crate) use document::TDocument;
+pub(crate) mod document;
 
 mod span;
 pub(crate) use span::TSpan;