Properly calculate expanded git diff hunk highlight ranges (#11632)

Closes https://github.com/zed-industries/zed/issues/11576

Release Notes:

- Fixed expanded diff hunks highlighting an extra row as added
([11576](https://github.com/zed-industries/zed/issues/11576))

crates/outline/src/outline.rs

@@ -142,7 +142,7 @@ impl OutlineViewDelegate {
             self.active_editor.update(cx, |active_editor, cx| {
                 active_editor.clear_row_highlights::<OutlineRowHighlights>();
                 active_editor.highlight_rows::<OutlineRowHighlights>(
-                    outline_item.range.clone(),
+                    outline_item.range.start..=outline_item.range.end,
                     Some(cx.theme().colors().editor_highlighted_line_background),
                     cx,
                 );
@@ -243,7 +243,7 @@ impl PickerDelegate for OutlineViewDelegate {
                 .and_then(|highlights| highlights.into_iter().next().map(|(rows, _)| rows.clone()))
             {
                 active_editor.change_selections(Some(Autoscroll::center()), cx, |s| {
-                    s.select_ranges([rows.start..rows.start])
+                    s.select_ranges([*rows.start()..*rows.start()])
                 });
                 active_editor.clear_row_highlights::<OutlineRowHighlights>();
                 active_editor.focus(cx);