anchor.diff:  ----
   
   When you give multiple profiles to `vlttng`, the first profile is
  -``patched'' with the second, which is then patched with the third, and
  +"`patched`" with the second, which is then patched with the third, and
   so on. Nonexistent properties are created; existing ones are replaced
   recursively. The `configure` properties are _joined_. For example, let's
   add the following profile (call it `more.yaml`) to the example above:
   
   [source,yaml]
  +----
   build-env:
     CFLAGS: -O0
     SOMEVAR: ok
  
positive.code: By default, `vlttng` hides the standard output and error of the commands
  it runs. In this mode, `vlttng` prints all the commands to run and the
  exported environment variables along with comments, so that you can
  ``replay'' the entire output as is to create the same virtual
  environment (except for the `activate` script which would not be
  generated).
  
  
negative.code: Profiles are written in YAML. Here is an example:
  
  [source,yaml]
  ----
  build-env:
    CFLAGS: -O0 -g3
  virt-env:
  