when eager execution is enabled.
    *   Automatic device placement has been enabled (i.e., use a GPU if
        available automatically, without requiring an explicit `with
        tf.device(“/gpu:0”)`) (Fixes #14133)
    *   `tf.GradientTape` has moved out of contrib.
*   `tf.keras`:
    *   Added the fashion mnist dataset.

* Setup development environment with Python's Venv and Flit, instead of requiring the extra Pipenv duplicating dependencies. Updated docs: [Development - Contributing](https://fastapi.tiangolo.com/contributing/). PR [#877](https://github.com/tiangolo/fastapi/pull/877).

the label\n  > .custom-file .custom-file-input:focus {\n    z-index: 4;\n  }\n\n  > .form-control,\n  > .custom-select {\n    &:not(:first-child) { @include border-left-radius(0); }\n  }\n\n  // Custom file inputs have more complex markup, thus requiring different\n  // border-radius overrides.\n  > .custom-file {\n    display: flex;\n    align-items: center;\n\n    &:not(:last-child) .custom-file-label,\n    &:not(:last-child) .custom-file-label::after { @include border-right-radius(0); }\n    &:not(:first-child)...