fix: use correct wording in unit test

Author: rwaffen

spec/unit/facter/puppetdb_version_spec.rb

@@ -10,20 +10,20 @@
     Facter.clear
   end
 
-  it 'should return the correct puppetdb version' do
+  it 'returns the correct puppetdb version' do
     allow(Facter::Util::Resolution).to receive(:which).with('puppetdb').and_return('/usr/bin/puppetdb')
     allow(Facter::Core::Execution).to receive(:execute).with('puppetdb --version').and_return("puppetdb version: 7.18.0\n")
 
     expect(Facter.fact(:puppetdb_version).value).to eq('7.18.0')
   end
 
-  it 'should return nil if puppetdb command is not available' do
+  it 'returns nil if puppetdb command is not available' do
     allow(Facter::Util::Resolution).to receive(:which).with('puppetdb').and_return(nil)
 
     expect(Facter.fact(:puppetdb_version).value).to be_nil
   end
 
-  it 'should return nil if puppetdb version output is nil' do
+  it 'returns nil if puppetdb version output is nil' do
     allow(Facter::Util::Resolution).to receive(:which).with('puppetdb').and_return('/usr/bin/puppetdb')
     allow(Facter::Core::Execution).to receive(:execute).with('puppetdb --version').and_return(nil)