Make sure the beep character will not get dropped again, by putting it at the front, and using a non-empty character as replacement, to make sure people choose the right width

build/boot/x86/menu.cfg

@@ -1,7 +1,7 @@
 menu hshift 7
 menu width 61
 
-menu title Debian GNU/Linux installer boot menu${BEEP}
+menu title ${BEEP}Debian GNU/Linux installer boot menu
 include ${SYSDIR}stdmenu.cfg
 include ${SYSDIR}txt.cfg
 include ${SYSDIR}amdtxt.cfg

build/config/x86.cfg

@@ -70,6 +70,10 @@ endif
 	mcopy -i$(TEMP_BOOT) $(TEMP)/disk.lbl ::disk.lbl
 
 	# syslinux configs
+
+        # Use a non-empty character for beep by default to make sure the menu
+        # is wide enough when beep is enabled.
+	beep="_"; \
 	[ "$(BOOTMENU_BEEP)" = y ] && beep="$$(printf '\a')"; \
 	subdirs=""; \
 	$(foreach file,$(shell syslinux-cfgs "$(TEMP_SYSLINUX)"), \
@@ -173,6 +177,9 @@ arch_cd_info_dir: x86_syslinux x86_grub_efi
 		cp -a $(TEMP_BOOT_SCREENS)/splash.png $(TEMP_CD_INFO_DIR); \
 	fi
 
+        # Use a non-empty character for beep by default to make sure the menu
+        # is wide enough when beep is enabled.
+	beep="_"; \
 	[ "$(BOOTMENU_BEEP)" = y ] && beep="$$(printf '\a')"; \
 	$(foreach file,$(shell syslinux-cfgs "$(TEMP_SYSLINUX)"), \
 		subdir=`dirname $(file)`; \
@@ -255,6 +262,9 @@ arch_miniiso: x86_syslinux x86_grub_efi
 	ln -f $(TEMP_KERNEL) $(TEMP_CD_TREE)/linux
 	ln -f $(TEMP_INITRD) $(TEMP_CD_TREE)/initrd.gz
 
+        # Use a non-empty character for beep by default to make sure the menu
+        # is wide enough when beep is enabled.
+	beep="_"; \
 	[ "$(BOOTMENU_BEEP)" = y ] && beep="$$(printf '\a')"; \
 	$(foreach file,$(shell syslinux-cfgs "$(TEMP_SYSLINUX)"), \
 		subdir=`dirname $(file)`; \
@@ -339,6 +349,9 @@ arch_netboot_dir: x86_syslinux
 	mkdir -p $(TEMP_NETBOOT_DIR)/$(BOOT_SCREEN_DIR)
 	cp /usr/lib/syslinux/vesamenu.c32 $(TEMP_NETBOOT_DIR)/$(BOOT_SCREEN_DIR)
 
+        # Use a non-empty character for beep by default to make sure the menu
+        # is wide enough when beep is enabled.
+	beep="_"; \
 	[ "$(BOOTMENU_BEEP)" = y ] && beep="$$(printf '\a')"; \
 	$(foreach file,$(shell syslinux-cfgs "$(TEMP_SYSLINUX)"), \
 		subdir=`dirname $(file)`; \