Fix formatting for code block in docs

website/source/docs/builders/virtualbox-ovf.html.markdown

@@ -19,13 +19,11 @@ image).
 When exporting from VirtualBox make sure to choose OVF Version 2, since Version
 1 is not compatible and will generate errors like this:
 
-==> virtualbox-ovf: Progress state: VBOX\_E\_FILE\_ERROR ==>
-virtualbox-ovf: VBoxManage: error: Appliance read failed ==> virtualbox-ovf:
-VBoxManage: error: Error reading "source.ova": element "Section" has no "type"
-attribute, line 21 ==> virtualbox-ovf: VBoxManage: error: Details: code
-VBOX\_E\_FILE\_ERROR (0x80bb0004), component Appliance, interface IAppliance
-==> virtualbox-ovf: VBoxManage: error: Context: "int
-handleImportAppliance(HandlerArg\*)" at line 304 of file VBoxManageAppliance.cpp
+    ==> virtualbox-ovf: Progress state: VBOX_E_FILE_ERROR
+    ==> virtualbox-ovf: VBoxManage: error: Appliance read failed
+    ==> virtualbox-ovf: VBoxManage: error: Error reading "source.ova": element "Section" has no "type" attribute, line 21
+    ==> virtualbox-ovf: VBoxManage: error: Details: code VBOX_E_FILE_ERROR (0x80bb0004), component Appliance, interface IAppliance
+    ==> virtualbox-ovf: VBoxManage: error: Context: "int handleImportAppliance(HandlerArg*)" at line 304 of file VBoxManageAppliance.cpp
 
 The builder builds a virtual machine by importing an existing OVF or OVA file.
 It then boots this image, runs provisioners on this new VM, and exports that VM