"puppet facts show fact" output differs from "facter fact"

Description of the problem: The output format is different between Facter and puppet facts when a query for a single fact is provided: ~~ puppet facts facterversion { "facterversion": "4.0.47" } vs ~~ facter facterversion 4.0.47 Description of the fix: Added --value-only command argument: When there is a single query, only display the value of the fact without it's name: ~~ puppet facts facterversion --value-only "4.0.47" Also this generates a warning message if the argument is used with multiple queries or with no query at all: puppet facts show facterversion os --value-only Warning: Incorrect use of --value-only argument! The argument can only be used when querying for a single fact Added flat render format: When there is a query for a simple fact: puppet facts show facterversion --render-as flat facterversion=4.0.47 and with --value-only puppet facts show facterversion --render-as flat --value-only 4.0.47 When there is a query for a more complex fact (ex. os) the output will be: ~~ puppet facts os --render-as flat os.architecture=x86_64 os.family=Darwin os.hardware=x86_64 os.macosx.build=18G95 os.macosx.product=Mac OS X os.macosx.version.full=10.14.6 os.macosx.version.major=10.14 os.macosx.version.minor=6 os.name=Darwin os.release.full=18.7.0 os.release.major=18 os.release.minor=7 and with --value-only ~~ puppet facts os --render-as flat --value-only architecture=x86_64 family=Darwin hardware=x86_64 macosx.build=18G95 macosx.product=Mac OS X macosx.version.full=10.14.6 macosx.version.major=10.14 macosx.version.minor=6 name=Darwin release.full=18.7.0 release.major=18 release.minor=7 For multiple user queries the output is : ~~ puppet facts show os.name facterversion --render-as flat facterversion=4.0.47 os.name=Darwin When the result is an array, the index of each element is also displayed: ~~ puppet facts show processors.models --render-as flat processors.models.0=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.1=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.2=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.3=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.4=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.5=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.6=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz processors.models.7=Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz ~~ puppet facts show networking.interfaces.interface_name.bindings6 --render-as flat --value-only 0.address=fe80::... 0.netmask=ffff:ffff:ffff:ffff:: 0.network=fe80:: 0.scope6=link