fix prepend on current index, also format

src/notebook.cc

@@ -208,9 +208,10 @@ void Notebook::open(const boost::filesystem::path &file_path_, size_t notebook_i
     };
     const auto file_name = view->file_path.filename();
     std::string prepend_current_view;
+    size_t current_view_index = 0;
     for (size_t c = 0; c < size(); ++c) {
       if (source_views[c] == view) {
-        update_label(c, prepend_current_view);
+        current_view_index = c;
         continue;
       }
       if (source_views[c]->file_path.filename() == file_name) {
@@ -229,6 +230,7 @@ void Notebook::open(const boost::filesystem::path &file_path_, size_t notebook_i
         update_label(c, it2->string() + (diff > 0 ? "/.../" : "/"));
       }
     }
+    update_label(current_view_index, prepend_current_view);
     update_status(view);
   };
   source_views.back()->update_status_diagnostics=[this](Source::View* view) {