package grub-pc 2.02~beta2-36ubuntu3.10 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

[Muelli]

seems normal upgrading failed.

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-pc 2.02~beta2-36ubuntu3.10
Uname: Linux 4.7.0-040700-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.6
Architecture: amd64
Date: Sat May 20 15:37:03 2017
DuplicateSignature:
 package:grub-pc:2.02~beta2-36ubuntu3.10
 Setting up grub-pc (2.02~beta2-36ubuntu3.10) ...
 /var/lib/dpkg/info/grub-pc.postinst: line 703: syntax error near unexpected token `fi'
 dpkg: error processing package grub-pc (--configure):
  subprocess installed post-installation script returned error exit status 2
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationDate: Installed on 2015-12-02 (535 days ago)
InstallationMedia: Ubuntu-GNOME 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151027)
ProcCmdLine: BOOT_IMAGE=/vmlinuz-4.7.0-040700-generic root=/dev/mapper/lvm--vg-ubuntu--root ro rootflags=subvol=@ cryptopts=target=crypto,source=/dev/disk/by-uuid/4a1951b7-3604-4891-8ec6-3f5c9112d30d quiet splash vt.handoff=7
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.2
 apt 1.2.20
SourcePackage: grub2
Title: package grub-pc 2.02~beta2-36ubuntu3.10 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.