*   Added experimental support for an exactly-once visitation guarantee for evaluating Keras models trained with `tf.distribute ParameterServerStrategy`, via the `exact_evaluation_shards` argument in `Model.fit` and `Model.evaluate`.

                                - required:
                                  - exact
                                - required:
                                  - prefix
                                - required:
                                  - regex
                            - required:
                              - exact
                            - required:
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border-top-left-radius: 0;\n  border-bottom-left-radius: 0;\n}\n\n.custom-control {\n  position: relative;\n  z-index: 1;\n  display: block;\n  min-height: 1.5rem;\n  padding-left: 1.5rem;\n  -webkit-print-color-adjust: exact;\n  color-adjust: exact;\n  print-color-adjust: exact;\n}\n\n.custom-control-inline {\n  display: -ms-inline-flexbox;\n  display: inline-flex;\n  margin-right: 1rem;\n}\n\n.custom-control-input {\n  position: absolute;\n  left: 0;\n  z-index: -1;\n  width: 1rem;\n  height: 1.25rem;\n...

- Updated the API documentation for Service.Spec.IPFamily to warn that its exact
  semantics will probably change before the dual-stack feature goes GA, and users
  should look at ClusterIP or Endpoints, not IPFamily, to figure out if an existing

Placed here since it has to come after the potential zebra striping\n\n.table-hover {\n  tbody tr {\n    @include hover() {\n      color: $table-hover-color;\n      background-color: $table-hover-bg;\n    }\n  }\n}\n\n\n// Table backgrounds\n//\n// Exact selectors below required to override `.table-striped` and prevent\n// inheritance to nested tables.\n\n@each $color, $value in $theme-colors {\n  @include table-row-variant($color, theme-color-level($color, $table-bg-level), theme-color-level($color,...