[Bug 1870375] Re: package friendly-recovery 0.2.31ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

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** Tags removed: need-duplicate-check

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https://bugs.launchpad.net/bugs/1870375

Title:
  package friendly-recovery 0.2.31ubuntu2.1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 2

Status in friendly-recovery package in Ubuntu:
  New

Bug description:
  failed

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: friendly-recovery 0.2.31ubuntu2.1
  ProcVersionSignature: Ubuntu 3.13.0-170.220-generic 3.13.11-ckt39
  Uname: Linux 3.13.0-170-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.23
  Architecture: amd64
  Date: Thu Apr  2 19:50:29 2020
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-trusty-amd64-20140620-0
  DuplicateSignature:
   package:friendly-recovery:0.2.31ubuntu2.1
   Installing new version of config file /etc/kernel/postrm.d/zz-update-grub ...
   /var/lib/dpkg/info/grub-efi-amd64.config: 35: /etc/default/grub: Syntax error: EOF in backquote substitution
   dpkg: error processing package grub-efi-amd64 (--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 2017-12-05 (849 days ago)
  InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary 20140620-04:25
  PackageArchitecture: all
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.6
   apt  1.2.32
  SourcePackage: friendly-recovery
  Title: package friendly-recovery 0.2.31ubuntu2.1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
  UpgradeStatus: Upgraded to xenial on 2020-04-02 (0 days ago)
  upstart.friendly-recovery.override: manual

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