Compare raw-value.

src/compare/diff.rs

@@ -714,7 +714,19 @@ fn compare_heading<'s>(
         (None, false) | (Some(_), true) => {}
     }
 
-    // TODO: Compare :pre-blank :raw-value :footnote-section-p :scheduled :closed
+    // Compare raw-value
+    let raw_value = get_property_quoted_string(emacs, ":raw-value")?
+        .ok_or("Headlines should have :raw-value.")?;
+    let rust_raw_value = rust.get_raw_value();
+    if raw_value != rust_raw_value {
+        this_status = DiffStatus::Bad;
+        message = Some(format!(
+            "raw-value mismatch (emacs != rust) {:?} != {:?}",
+            raw_value, rust_raw_value
+        ));
+    }
+
+    // TODO: Compare :pre-blank :footnote-section-p :scheduled :closed
     //
     // :scheduled and :closed seem to only appear when the headline has a planning