Fix handling of property drawers containing only whitespace.

src/types/lesser_element.rs

@@ -204,10 +204,29 @@ impl<'s> Paragraph<'s> {
     ///
     /// This is used for elements that support an "empty" content like greater blocks.
     pub(crate) fn of_text(source: &'s str, body: &'s str) -> Self {
+        // TODO: This should be replaced with of_text_full.
         Paragraph {
             source,
-            contents: None,   // TODO
-            post_blank: None, // TODO
+            contents: None,
+            post_blank: None,
+            affiliated_keywords: AffiliatedKeywords::default(),
+            children: vec![Object::PlainText(PlainText { source: body })],
+        }
+    }
+
+    /// Generate a paragraph of the passed in text with no additional properties.
+    ///
+    /// This is used for elements that support an "empty" content like greater blocks.
+    pub(crate) fn of_text_full(
+        source: &'s str,
+        body: &'s str,
+        contents: Option<&'s str>,
+        post_blank: Option<&'s str>,
+    ) -> Self {
+        Paragraph {
+            source,
+            contents,
+            post_blank,
             affiliated_keywords: AffiliatedKeywords::default(),
             children: vec![Object::PlainText(PlainText { source: body })],
         }