Errorneous fstab patching in boot image

[hh85v2]

Issue:
Looks like the mount option 'fileencrypt' is considered to be parameterless, thus only this world itself is deleting from userdata entry. In the case it has some parameters that leads to the spare tail inside fstab line, which prevents userdata partition mounting. The result is continuous bootlooping. Here is the diff between ramdisks unpacked from both original and patched bootimages:

--- ramdisk.orig/fstab.mt6771 2021-03-09 08:18:57.899091100 +0200 +++ ramdisk.patched/fstab.mt6771 2021-03-09 08:20:18.814931800 +0200 @@ -19,7 +19,7 @@ -/dev/block/platform/bootdevice/by-name/userdata /data ext4 noatime,nosuid,nodev,noauto_da_alloc,errors=panic wait,check,formattable,quota,resize,reservedsize=128m,checkpoint=block,fileencryption=aes-256-xts +/dev/block/platform/bootdevice/by-name/userdata /data ext4 noatime,nosuid,nodev,noauto_da_alloc,errors=panic wait,check,formattable,quota,resize,reservedsize=128m,checkpoint=block,=aes-256-xts

Suggestion:
Use regexp like ,f[a-z]*encrypt=*[^$,]* to delete from fstab while patching boot. It would remove both 'fileencrypt' and 'forceencrypt' options together with thier parameters and leading commas.