From 56b50d6580e21699b4ff8d24ad53da5fcec20413 Mon Sep 17 00:00:00 2001
From: Axel Kohlmeyer <akohlmey@gmail.com>
Date: Wed, 2 Aug 2023 05:37:56 -0400
Subject: [PATCH] ensure final newline when saving to file

---
 tools/lammps-gui/lammpsgui.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/lammps-gui/lammpsgui.cpp b/tools/lammps-gui/lammpsgui.cpp
index 904cab796f..19d4c13dbf 100644
--- a/tools/lammps-gui/lammpsgui.cpp
+++ b/tools/lammps-gui/lammpsgui.cpp
@@ -278,6 +278,7 @@ void LammpsGui::write_file(const QString &fileName)
     QTextStream out(&file);
     QString text = ui->textEdit->toPlainText();
     out << text;
+    if (text.back().toLatin1() != '\n') out << "\n"; // add final newline if missing
     file.close();
     dirstatus->setText(QString(" Directory: ") + current_dir);
     ui->textEdit->document()->setModified(false);