Bug after editing 40_custom

[PERCE-NEIGE]

Everything worked fine, until I created and edited the 40_custom file.

I wanted to add Android-x86 Lineage to Grub, which is not possible through os-prober.

After refreshing Grub-customizer to take into consideration the content of 40_custom, 40_custom disappeared (it can't be found in the "backup" file in grub.d, the only 40_custom in this backup folder is an untouched version, without what I've added.) and it produced a Grub-customizer error.

Content of 40_custom:
#!/bin/sh
exec tail -n +3 $0
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
menuentry "LINEAGEx" {
set root='(hd0,17)'
linux /android-4.4-RC2/kernel quiet root=/dev/ram0 androidboot.hardware=android_x86 acpi_sleep=s3_bios,s3_mode SRC=/android-4.4-RC2S SDCARD=/data/sdcard.img
initrd /android-4.4-RC2/initrd.img}

Output error from Grub-customizer:
Failed running "grub-mkconfig -o" /boot/grub/grub.cfg" output:
Sourcing file "/etc/default/grub"
Sourcing file "/etc/default/grub.d/50_peppermint.cfg"
Création du fichier de configuration GRUB...
Thème trouvé (...)
Image Linux trouvée:/boot/vmlinuz-4.15.0-101-generic
Image mémoire initiale trouvée: /boot/initrd.img-4.15.0-101-generic
(...)
erreur:syntax error.
erreur:Incorrect command.
erreur:syntax error.
Erreur de syntaxe à la ligne 124
Des erreurs de syntaxe sont détectées dans le fichier de configuration GRUB. (....)

Grub.new content =>

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  set have_grubenv=true
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="${saved_entry}"
fi

if [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

if [ "${prev_saved_entry}" ]; then
  set saved_entry="${prev_saved_entry}"
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z "${boot_once}" ]; then
    saved_entry="${chosen}"
    save_env saved_entry
  fi
}
function recordfail {
  set recordfail=1
  if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}
function load_video {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos5'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos5 --hint-efi=hd0,msdos5 --hint-baremetal=ahci0,msdos5 --hint='hd0,msdos5' 871d1117-1dd7-4348-a4e6-9d4912737ce5
else
  search --no-floppy --fs-uuid --set=root 871d1117-1dd7-4348-a4e6-9d4912737ce5
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=fr_FR
  insmod gettext
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1' b0182798-5eb8-4218-a1e3-413e95a20a06
else
  search --no-floppy --fs-uuid --set=root b0182798-5eb8-4218-a1e3-413e95a20a06
fi
insmod gfxmenu
loadfont ($root)/grub/themes/starfield/dejavu_10.pf2
loadfont ($root)/grub/themes/starfield/dejavu_12.pf2
loadfont ($root)/grub/themes/starfield/dejavu_14.pf2
loadfont ($root)/grub/themes/starfield/dejavu_16.pf2
loadfont ($root)/grub/themes/starfield/dejavu_bold_14.pf2
insmod png
set theme=($root)/grub/themes/starfield/theme.txt
export theme
if [ "${recordfail}" = 1 ] ; then
  set timeout=30
else
  if [ x$feature_timeout_style = xy ] ; then
    set timeout_style=menu
    set timeout=10
  # Fallback normal timeout code in case the timeout_style feature is
  # unavailable.
  else
    set timeout=10
  fi
fi
play 480 440 1
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=light-gray/black
set menu_color_highlight=white/red
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/40_custom_proxy ###
menuentry "LINEAGEx" { set root='(hd0,7)' linux /android-6.0-rc1/kernel quiet root=/dev/ram0 androidboot.hardware=android_x86 acpi_sleep=s3_bios,s3_mode SRC=/android-6.0-rc1 SDCARD=/data/sdcard.img initrd /android-6.0-rc1/initrd.img{
}
### END /etc/grub.d/40_custom_proxy ###

### BEGIN /etc/grub.d/41_linux_proxy ###

function gfxmode {
 set gfxpayload="${1}"
 if [ "${1}" = "keep" ]; then
  set vt_handoff=vt.handoff=1
 else
  set vt_handoff=
 fi
}
if [ "${recordfail}" != 1 ]; then
  if [ -e ${prefix}/gfxblacklist.txt ]; then
    if hwmatch ${prefix}/gfxblacklist.txt 3; then
      if [ ${match} = 0 ]; then
        set linux_gfx_mode=keep
      else
        set linux_gfx_mode=text
      fi
    else
      set linux_gfx_mode=text
    fi
  else
    set linux_gfx_mode=keep
  fi
else
  set linux_gfx_mode=text
fi
export linux_gfx_mode

menuentry "Peppermint GNU/Linux" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-871d1117-1dd7-4348-a4e6-9d4912737ce5' {
 recordfail
 savedefault
 load_video
 gfxmode $linux_gfx_mode
 insmod gzio
 if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
 insmod part_msdos
 insmod ext2
 set root='hd0,msdos1'
 if [ x$feature_platform_search_hint = xy ]; then
   search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1' b0182798-5eb8-4218-a1e3-413e95a20a06
 else
   search --no-floppy --fs-uuid --set=root b0182798-5eb8-4218-a1e3-413e95a20a06
 fi
        linux /vmlinuz-4.15.0-101-generic root=UUID=871d1117-1dd7-4348-a4e6-9d4912737ce5 ro quiet splash $vt_handoff
 initrd /initrd.img-4.15.0-101-generic
}
submenu "Options avancées pour Peppermint GNU/Linux"{
menuentry "Peppermint GNU/Linux, avec Linux 4.15.0-101-generic" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-101-generic-advanced-871d1117-1dd7-4348-a4e6-9d4912737ce5' {
  recordfail
 savedefault
  load_video
  gfxmode $linux_gfx_mode
  insmod gzio
  if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  insmod part_msdos
  insmod ext2
  set root='hd0,msdos1'
  if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1' b0182798-5eb8-4218-a1e3-413e95a20a06
  else
    search --no-floppy --fs-uuid --set=root b0182798-5eb8-4218-a1e3-413e95a20a06
  fi
  echo 'Chargement de Linux 4.15.0-101-generic…'
         linux /vmlinuz-4.15.0-101-generic root=UUID=871d1117-1dd7-4348-a4e6-9d4912737ce5 ro quiet splash $vt_handoff
  echo 'Chargement du disque mémoire initial…'
  initrd /initrd.img-4.15.0-101-generic
}
menuentry "Peppermint GNU/Linux, with Linux 4.15.0-101-generic (recovery mode)" --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-4.15.0-101-generic-recovery-871d1117-1dd7-4348-a4e6-9d4912737ce5' {
  recordfail
  load_video
  insmod gzio
  if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
  insmod part_msdos
  insmod ext2
  set root='hd0,msdos1'
  if [ x$feature_platform_search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 --hint='hd0,msdos1' b0182798-5eb8-4218-a1e3-413e95a20a06
  else
    search --no-floppy --fs-uuid --set=root b0182798-5eb8-4218-a1e3-413e95a20a06
  fi
  echo 'Chargement de Linux 4.15.0-101-generic…'
         linux /vmlinuz-4.15.0-101-generic root=UUID=871d1117-1dd7-4348-a4e6-9d4912737ce5 ro recovery nomodeset
  echo 'Chargement du disque mémoire initial…'
  initrd /initrd.img-4.15.0-101-generic
}
}
### END /etc/grub.d/41_linux_proxy ###

### BEGIN /etc/grub.d/42_custom_proxy ###

# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.

menuentry "LINEAGEx" { set root='(hd0,7)' linux /android-6.0-rc1/kernel quiet root=/dev/ram0 androidboot.hardware=android_x86 acpi_sleep=s3_bios,s3_mode SRC=/android-6.0-rc1 SDCARD=/data/sdcard.img initrd /android-6.0-rc1/initrd.img{
}
### END /etc/grub.d/42_custom_proxy ###

### BEGIN /etc/grub.d/45_linux_xen ###

### END /etc/grub.d/45_linux_xen ###

### BEGIN /etc/grub.d/46_os-prober_proxy ###

set timeout_style=menu
if [ "${timeout}" = 0 ]; then
  set timeout=10
fi
menuentry "Windows Recovery Environment (sur /dev/sda6)" --class windows --class os $menuentry_id_option 'osprober-chain-3965-EAB6' {
 savedefault
 insmod part_msdos
 insmod fat
 set root='hd0,msdos6'
 if [ x$feature_platform_search_hint = xy ]; then
   search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 --hint='hd0,msdos6' 3965-EAB6
 else
   search --no-floppy --fs-uuid --set=root 3965-EAB6
 fi
 parttool ${root} hidden-
 drivemap -s (hd0) ${root}
 chainloader +1
}
### END /etc/grub.d/46_os-prober_proxy ###

### BEGIN /etc/grub.d/47_custom_proxy ###
menuentry "LINEAGEx" { set root='(hd0,7)' linux /android-6.0-rc1/kernel quiet root=/dev/ram0 androidboot.hardware=android_x86 acpi_sleep=s3_bios,s3_mode SRC=/android-6.0-rc1 SDCARD=/data/sdcard.img initrd /android-6.0-rc1/initrd.img{
}
### END /etc/grub.d/47_custom_proxy ###

### BEGIN /etc/grub.d/48_linux_proxy ###
### END /etc/grub.d/48_linux_proxy ###

### BEGIN /etc/grub.d/49_os-prober_proxy ###
menuentry "Windows Recovery Environment (sur /dev/sda6)" --class windows --class os $menuentry_id_option 'osprober-chain-3965-EAB6' {
 savedefault
 insmod part_msdos
 insmod fat
 set root='hd0,msdos6'
 if [ x$feature_platform_search_hint = xy ]; then
   search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos6 --hint-efi=hd0,msdos6 --hint-baremetal=ahci0,msdos6 --hint='hd0,msdos6' 3965-EAB6
 else
   search --no-floppy --fs-uuid --set=root 3965-EAB6
 fi
 parttool ${root} hidden-
 drivemap -s (hd0) ${root}
 chainloader +1
}
### END /etc/grub.d/49_os-prober_proxy ###

### BEGIN /etc/grub.d/50_linux_proxy ###
### END /etc/grub.d/50_linux_proxy ###

### BEGIN /etc/grub.d/51_uefi-firmware ###
### END /etc/grub.d/51_uefi-firmware ###

### BEGIN /etc/grub.d/52_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/52_custom ###