kernel_module: correct docs style for code boxes (#2348)

Signed-off-by: Patrick Münch <patrick.muench1111@gmail.com>

docs/resources/kernel_module.md.erb

@@ -41,51 +41,51 @@ The following examples show how to use this InSpec audit resource.
 
 ### Test a modules 'version'
 
-    describe kernel_module('bridge') do
-      it { should be_loaded }
-      its(:version) { should cmp >= '2.2.2' }
-    end
+      describe kernel_module('bridge') do
+        it { should be_loaded }
+        its(:version) { should cmp >= '2.2.2' }
+      end
 
 ### Test if a module is loaded, not disabled and not blacklisted
 
-    describe kernel_module('video') do
-      it { should be_loaded }
-      it { should_not be_disabled }
-      it { should_not be_blacklisted }
-    end
+      describe kernel_module('video') do
+        it { should be_loaded }
+        it { should_not be_disabled }
+        it { should_not be_blacklisted }
+      end
 
 ### Check if a module is blacklisted
 
-    describe kernel_module('floppy') do
-      it { should be_blacklisted }
-    end
+      describe kernel_module('floppy') do
+        it { should be_blacklisted }
+      end
 
 ### Ensure a module is *not* blacklisted and it is loaded
 
-    describe kernel_module('video') do
-      it { should_not be_blacklisted }
-      it { should be_loaded }
-    end
+      describe kernel_module('video') do
+        it { should_not be_blacklisted }
+        it { should be_loaded }
+      end
 
 ### Ensure a module is disabled via 'bin_false'
 
-    describe kernel_module('sstfb') do
-      it { should_not be_loaded }
-      it { should be_disabled }
-    end
+      describe kernel_module('sstfb') do
+        it { should_not be_loaded }
+        it { should be_disabled }
+      end
 
 ### Ensure a module is 'blacklisted'/'disabled' via 'bin_true'
 
-    describe kernel_module('nvidiafb') do
-      it { should_not be_loaded }
-      it { should be_blacklisted }
-    end
+      describe kernel_module('nvidiafb') do
+        it { should_not be_loaded }
+        it { should be_blacklisted }
+      end
 
 ### Ensure a module is not loaded
 
-    describe kernel_module('dhcp') do
-      it { should_not be_loaded }
-    end
+      describe kernel_module('dhcp') do
+        it { should_not be_loaded }
+      end
 
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