old_contents: """
  IsRhel6, IsRhel7 and IsRhel8
  ===============================
  
  The ``IsRhel*`` components each use the ``RedhatRelease`` combiner to
  retrieve the RHEL version information.
  Each component checks if the release version matches the version it represents,
  if the version does not match what is expected the class raises ``SkipComponent``
  so that the dependent component will not fire.
  Can be added as a dependency of a parser so that the parser only fires if the
  ``IsRhel*`` dependency is met.
  
  An example from the following ``/etc/redhat_release`` file output::
  
      Red Hat Enterprise Linux release 8.0 (Ootpa)
  
  Example:
  
      >>> type(IsRhel8)
      <class 'insights.components.rhel_version.Is_Rhel8'>
      >>> is_rhel8.rhel_version
      '8.0'
  """
  
  from insights.core.plugins import component
  from insights.combiners.redhat_release import RedHatRelease
  from insights.core.dr import SkipComponent
  
  
  @component(RedHatRelease)
  class IsRhel6(object):
      """
      This component uses ``RedHatRelease`` combiner
      to determine RHEL version. It checks if RHEL6, if not
      RHEL6 it raises ``SkipComponent``.
  
      Raises:
          SkipComponent: When RHEL version is not RHEL6.
      """
      def __init__(self, rhel):
          if rhel.major != 6:
              raise SkipComponent('Not RHEL6')
  
  
  @component(RedHatRelease)
  class IsRhel7(object):
      """
      This component uses ``RedHatRelease`` combiner
      to determine RHEL version. It checks if RHEL7, if not \
      RHEL7 it raises ``SkipComponent``.
  
      Raises:
          SkipComponent: When RHEL version is not RHEL7.
      """
      def __init__(self, rhel):
          if rhel.major != 7:
              raise SkipComponent('Not RHEL7')
  
  
  @component(RedHatRelease)
  class IsRhel8(object):
      """
      This component uses ``RedhatRelease`` combiner
      to determine RHEL version. It checks if RHEL8, if not
      RHEL8 it raises ``SkipComponent``.
  
      Raises:
          SkipComponent: When RHEL version is not RHEL8.
      """
      def __init__(self, rhel):
          if rhel.major != 8:
              raise SkipComponent('Not RHEL8')
  
new_contents: """
  IsRhel6, IsRhel7 and IsRhel8
  ===============================
  
  An ``IsRhel*`` component is valid if the
  :py:class:`insights.combiners.redhat_release.RedHatRelease` combiner indicates
  the major RHEL version represented by the component. Otherwise, it raises a
  :py:class:`insights.core.dr.SkipComponent` to prevent dependent components from
  executing.
  
  In particular, an ``IsRhel*`` component can be added as a dependency of a
  parser to limit it to a given version.
  """
  
  from insights.core.plugins import component
  from insights.combiners.redhat_release import RedHatRelease
  from insights.core.dr import SkipComponent
  
  
  @component(RedHatRelease)
  class IsRhel6(object):
      """
      This component uses ``RedHatRelease`` combiner
      to determine RHEL version. It checks if RHEL6, if not
      RHEL6 it raises ``SkipComponent``.
  
      Raises:
          SkipComponent: When RHEL version is not RHEL6.
      """
      def __init__(self, rhel):
          if rhel.major != 6:
              raise SkipComponent('Not RHEL6')
  
  
  @component(RedHatRelease)
  class IsRhel7(object):
      """
      This component uses ``RedHatRelease`` combiner
      to determine RHEL version. It checks if RHEL7, if not \
      RHEL7 it raises ``SkipComponent``.
  
      Raises:
          SkipComponent: When RHEL version is not RHEL7.
      """
      def __init__(self, rhel):
          if rhel.major != 7:
              raise SkipComponent('Not RHEL7')
  
  
  @component(RedHatRelease)
  class IsRhel8(object):
      """
      This component uses ``RedhatRelease`` combiner
      to determine RHEL version. It checks if RHEL8, if not
      RHEL8 it raises ``SkipComponent``.
  
      Raises:
          SkipComponent: When RHEL version is not RHEL8.
      """
      def __init__(self, rhel):
          if rhel.major != 8:
              raise SkipComponent('Not RHEL8')
  
subject: Remove example from insights.components.rhel_version pydoc. (#2062)