[FACT-1870] Stdout in facts invalidates formatted output (yaml/json) - Puppet Jira Server

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When there is output to stdout in facts it creates a problem with the format options:

Facter.add('test') do

 confine :kernel => 'Linux'

 begin

 test = 'nomatch'

 test = Facter.value(:doesntexist).strip()

setcode { test }

rescue Exception => ex

 puts "#{File.basename(__FILE__)} - ruby fact threw an exception: #{ex}"

end

end

Output:

# facter -p -j test

test.rb - ruby fact threw an exception: undefined method `strip' for nil:NilClass

 "test": ""

Desired Outcome:

using --json or --yaml should print the valid format even if there are messages sent to stdout.

relates to

FACT-1877 Add documentation for Debugging, Exceptions and Logging