Comment 2 for bug 991099

You seem to have a configuration error in your /etc/environment file which you will need to resolve manually.

Processing triggers for install-info ...^M
/etc/environment: linha 4: fim do arquivo inesperado enquanto procurava por `"'^M
dpkg: error processing install-info (--unpack):^M
 subprocess installed post-installation script returned error exit status 2^M