Check that it is installed and working:
$ ruby -e 'require "rubygems"; require "psych"; require "pp"; pp Psych.load %Q[- this\n- is\n- an array\n- of strings]'(from https://github.com/masnick/beautify-gem/wiki/Installing-psych-on-Windows)
Created
June 20, 2013 08:21
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Ruby dependency hell
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