[Bug 1458549] Re: grub-efi-amd64 update fails missing quote

[ssducf]

I agree, there should be output earlier than this message indicating
there was a parse error.

But there is NOT any output prior to this.   This is thie bug.  Please
re-open this.

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https://bugs.launchpad.net/bugs/1458549

Title:
  grub-efi-amd64 update fails missing quote

Status in grub2 package in Ubuntu:
  Invalid

Bug description:
  On running normal updates, grub-efi-amd64 failed even though update-
  grub and install-grub succeeded when run manually.

  After a bit of digging and googling, it turns out that
  /etc/default/grub was missing a quote on a line that the updates were
  trying to edit.

  
  Output generated:
    dpkg: error processing package grub-efi-amd64 (--configure):
     subprocess installed post-installation script returned error exit status 128

  
  Output expected:
    Either emit a useful error message so this can be fixed, or go ahead and add the quote missing from the line.

  Line at fault was:

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash

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