Error while removing datadog-agent

ubuntu@zupec-hosting:~$ sudo apt-get --purge remove datadog-agent
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  datadog-agent*
0 upgraded, 0 newly installed, 1 to remove and 297 not upgraded.
1 not fully installed or removed.
After this operation, 240 MB disk space will be freed.
Do you want to continue? [Y/n]
Setting up install-info (5.2.0.dfsg.1-2) ...
/etc/environment: line 3: unexpected EOF while looking for matching ``'
dpkg: error processing package install-info (--configure):
 subprocess installed post-installation script returned error exit status 2
Errors were encountered while processing:
 install-info
E: Sub-process /usr/bin/dpkg returned an error code (1)