Force newline at end of file on prettier style format

src/source.cpp

@@ -1001,6 +1001,8 @@ void Source::View::setup_format_style(bool is_generic_view) {
         {
           LockGuard lock(mutex);
           if(result) {
+            if(!result->text.empty() && result->text.back() != '\n') // Workaround for prettier-plugin-latex that has missing newline at end of file
+              result->text += '\n';
             replace_text(result->text);
             if(result->cursor_offset >= 0 && result->cursor_offset < get_buffer()->size()) {
               get_buffer()->place_cursor(get_buffer()->get_iter_at_offset(result->cursor_offset));
@@ -1047,7 +1049,10 @@ void Source::View::setup_format_style(bool is_generic_view) {
         std::stringstream stdin_stream(get_buffer()->get_text().raw()), stdout_stream, stderr_stream;
         auto exit_status = Terminal::get().process(stdin_stream, stdout_stream, command, this->file_path.parent_path(), &stderr_stream);
         if(exit_status == 0) {
-          replace_text(stdout_stream.str());
+          auto text = stdout_stream.str();
+          if(!text.empty() && text.back() != '\n') // Workaround for prettier-plugin-latex that has missing newline at end of file
+            text += '\n';
+          replace_text(text);
           std::string line;
           std::getline(stderr_stream, line);
           if(!line.empty() && line != "NaN") {