test(inspec): add test to check `.vimrc` file is generated properly

test/integration/vimrc/controls/config_spec.rb

+# frozen_string_literal: true
+
+control 'vimrc is managed' do
+  title 'formula should manage .vimrc'
+
+  describe file('/home/vim_user/.vimrc') do
+    it { should be_owned_by 'vim_user' }
+    its('mode') { should cmp '0644' }
+    its('content') { should match(/syntax on/) }
+  end
+end