[LyX/master] Escape single quotes in bformat string

[Juergen Spitzmueller]

commit bfab8f943554d97ecb60e3a3f3702397aff43863
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Wed Feb 15 11:45:16 2023 +0100

    Escape single quotes in bformat string
---
 src/frontends/qt/GuiPrefs.cpp |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/frontends/qt/GuiPrefs.cpp b/src/frontends/qt/GuiPrefs.cpp
index 7e67440..70fe86a 100644
--- a/src/frontends/qt/GuiPrefs.cpp
+++ b/src/frontends/qt/GuiPrefs.cpp
@@ -2779,7 +2779,7 @@ void PrefDocHandling::updateRC(LyXRC const & rc)
 		docstring const tip = bformat(_("If this is checked, a backup of the document is created "
 						"in the backup directory (%1$s). "
 						"The backup file has the full original path and name as file name "
-						"and the suffix '.lyx~' (e.g., mydir!filename.lyx~). "
+						"and the suffix \'.lyx~\' (e.g., mydir!filename.lyx~). "
 						"Note that these files are hidden by default by some file managers."),
 					      FileName(rc.backupdir_path).absoluteFilePath());
 		backupCB->setToolTip(toqstr(tip));