Fix: List should not ignore empty string items

src/text.rs

@@ -292,10 +292,16 @@ impl<'a> Text<'a> {
     where
         T: Into<Cow<'a, str>>,
     {
+        let lines: Vec<_> = match content.into() {
+            Cow::Borrowed(s) => s.lines().map(Spans::from).collect(),
+            Cow::Owned(s) => s.lines().map(|l| Spans::from(l.to_owned())).collect(),
+        };
+
         Text {
-            lines: match content.into() {
-                Cow::Borrowed(s) => s.lines().map(Spans::from).collect(),
-                Cow::Owned(s) => s.lines().map(|l| Spans::from(l.to_owned())).collect(),
+            lines: if lines.len() == 0 {
+                vec![Spans::from("")]
+            } else {
+                lines
             },
         }
     }

tests/widgets_list.rs

@@ -198,3 +198,30 @@ fn widgets_list_should_repeat_highlight_symbol() {
     }
     terminal.backend().assert_buffer(&expected);
 }
+
+#[test]
+fn widget_list_should_not_ignore_empty_string_items() {
+    let backend = TestBackend::new(6, 4);
+    let mut terminal = Terminal::new(backend).unwrap();
+
+    terminal
+        .draw(|f| {
+            let items = vec![
+                ListItem::new("Item 1"),
+                ListItem::new(""),
+                ListItem::new(""),
+                ListItem::new("Item 4"),
+            ];
+
+            let list = List::new(items)
+                .style(Style::default())
+                .highlight_style(Style::default());
+
+            f.render_widget(list, f.size());
+        })
+        .unwrap();
+
+    let expected = Buffer::with_lines(vec!["Item 1", "", "", "Item 4"]);
+
+    terminal.backend().assert_buffer(&expected);
+}