software/kvm: Fix README.rst syntax

software/kvm/README.rst

@@ -18,9 +18,8 @@ KVM instance (1GB of RAM, 10GB of SSD, one core)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Note that the KVM instance will try to request a frontend slave instance in order
-to be accessible from IPv4.
+to be accessible from IPv4::
 
-::
   myawesomekvm = request(
       software_release=kvm,
       partition_reference="My awesome KVM",
@@ -97,11 +96,10 @@ KVM instance parameters:
     'th', 'tr']
 
 Resilient KVM instance
-~~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~~
 
-Like KVM instance, but backed-up (with history) in two places.
+Like KVM instance, but backed-up (with history) in two places::
 
-::
   kvm = 'https://lab.nexedi.com/nexedi/slapos/raw/slapos-0.188/software/kvm/software.cfg'
   myresilientkvm = request(
       software_release=kvm,