doc & logging fixes

[eytan-avisror]

Fixes #150

Logging fixed after adding missing ()

failed to terminate targets	{"reason": "AccessDenied: User: <reducted> is not authorized to perform: autoscaling:TerminateInstanceInAutoScalingGroup on resource:<reducted>\n\tstatus code: 403, request id: 3d1d3fab-e282-42f6-90dc-61699b9397f7", "scalinggroup": "instancemgr-dev-instance-manager-my-instance-group-2", "targets": ["i-025a0d00ddadf24b8"]}

Fixed docs for IAM permissions needed

[codecov]

Codecov Report

Merging #154 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #154   +/-   ##
=======================================
  Coverage   89.25%   89.25%           
=======================================
  Files          13       13           
  Lines        1563     1563           
=======================================
  Hits         1395     1395           
  Misses        111      111           
  Partials       57       57           

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