Removing ' from start and from end of line 107 and line 110 on file /var/lib/dpkg/info/flashplugin-nonfree.postinst upgrade goes fine.
HTH
Removing ' from start and from end of line 107 and line 110 on file dpkg/info/ flashplugin- nonfree. postinst
/var/lib/
upgrade goes fine.
HTH