fix(ast): preserve newline structure at end of gemtext

src/ast/container.rs

@@ -82,6 +82,14 @@ impl Ast {
       ));
     }
 
+    if source.chars().last().map_or(false, |c| c == '\n') {
+      if let Some(last) = ast.last() {
+        if !matches!(last, Node::Whitespace) {
+          ast.push(Node::Whitespace);
+        }
+      }
+    }
+
     Self { inner: ast }
   }
 
@@ -95,10 +103,10 @@ impl Ast {
   /// // the original Gemtext.
   /// assert_eq!(
   ///   germ::ast::Ast::from_nodes(
-  ///     germ::gemini_to_ast!("=> / Home\n").inner().to_vec()
+  ///     germ::gemini_to_ast!("=> / Home").inner().to_vec()
   ///   )
   ///   .to_gemtext(),
-  ///   "=> / Home\n"
+  ///   "=> / Home"
   /// );
   /// ```
   #[must_use]
@@ -145,6 +153,10 @@ impl Ast {
       }
     }
 
+    if gemtext.ends_with('\n') && !gemtext.ends_with("\n\n") {
+      gemtext.pop();
+    }
+
     gemtext
   }
 
@@ -279,7 +291,7 @@ impl Ast {
 
           break;
         }
-        // This as a catchall, it does a number of things.
+        // This as a catchall. It does a number of things.
         _ => {
           if *in_preformatted {
             // If we are in a preformatted line context, add the line to the

src/ast/macros.rs

@@ -26,7 +26,7 @@
 ///   germ::gemini_to_ast!("=> / A link!").to_gemtext(),
 ///   // `to_gemtext` appends a newline to all responses, so let's make sure we
 ///   // account for that.
-///   format!("{}\n", "=> / A link!"),
+///   "=> / A link!",
 /// );
 #[macro_export]
 macro_rules! gemini_to_ast {

tests/ast.rs

@@ -88,7 +88,7 @@ That was a link without text."#;
       Ast::from_string(EXAMPLE_GEMTEXT).to_gemtext(),
       // `to_gemtext` appends a newline to all responses, so let's make sure we
       // account for that.
-      format!("{}\n", EXAMPLE_GEMTEXT),
+      EXAMPLE_GEMTEXT
     );
   }
 
@@ -98,16 +98,16 @@ That was a link without text."#;
       germ::gemini_to_ast!(EXAMPLE_GEMTEXT).to_gemtext(),
       // `to_gemtext` appends a newline to all responses, so let's make sure we
       // account for that.
-      format!("{}\n", EXAMPLE_GEMTEXT),
+      EXAMPLE_GEMTEXT
     );
   }
 
   #[test]
   fn gemtext_to_ast_then_node_to_ast_to_gemtext() {
     assert_eq!(
-      Ast::from_nodes(germ::gemini_to_ast!("=> / Home\n").inner().to_vec())
+      Ast::from_nodes(germ::gemini_to_ast!("=> / Home").inner().to_vec())
         .to_gemtext(),
-      "=> / Home\n"
+      "=> / Home"
     );
   }
 }