relative imports in API `__init__.py` files.
*   Auto Mixed-Precision graph optimizer simplifies converting models to
    `float16` for acceleration on Volta and Turing Tensor Cores. This feature
    can be enabled by wrapping an optimizer class with
    `tf.train.experimental.enable_mixed_precision_graph_rewrite()`.
*   Add environment variable `TF_CUDNN_DETERMINISTIC`. Setting to "true" or "1"

https://html.spec.whatwg.org/multipage/#the-fieldset-and-legend-elements\n  min-width: 0;\n  // Reset the default outline behavior of fieldsets so they don't affect page layout.\n  padding: 0;\n  margin: 0;\n  border: 0;\n}\n\n// 1. Correct the text wrapping in Edge and IE.\n// 2. Correct the color inheritance from `fieldset` elements in IE.\nlegend {\n  display: block;\n  width: 100%;\n  max-width: 100%; // 1\n  padding: 0;\n  margin-bottom: .5rem;\n  @include font-size(1.5rem);\n  line-height: inherit;\n...

On POWER8/ppc64le, emulate the POWER9 instructions by loading unaligned // doublewords and byte-swapping each doubleword to emulate BE load/stores. #define NEEDS_ESPERM #define P8_LXVB16X(RA,RB,VT) \ LXVD2X (RA+RB), VT \ VPERM VT, VT, ESPERM, VT #define P8_STXVB16X(VS,RA,RB) \ VPERM VS, VS, ESPERM, TMP2 \ STXVD2X TMP2, (RA+RB) #define XXBRD_ON_LE(VA,VT) \ VPERM VA, VA, ESPERM, VT // Setup byte-swapping permute value in ESPERM for POWER9 instruction // emulation macros. #define SETUP_ESPERM(rtmp) \...

     */
    String getOnlineHelpNameDictStemmeroverride();

    /**
     * Get the value for the key 'online.help.name.dict.mapping'. <br>
     * The value is, e.g. mapping <br>
     * comment: Online help key for mapping dictionary.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getOnlineHelpNameDictMapping();

On POWER8/ppc64le, emulate the POWER9 instructions by loading unaligned // doublewords and byte-swapping each doubleword to emulate BE load/stores. #define NEEDS_ESPERM #define P8_LXVB16X(RA,RB,VT) \ LXVD2X (RA+RB), VT \ VPERM VT, VT, ESPERM, VT #define P8_STXVB16X(VS,RA,RB) \ VPERM VS, VS, ESPERM, TMP2 \ STXVD2X TMP2, (RA+RB) #define XXBRD_ON_LE(VA,VT) \ VPERM VA, VA, ESPERM, VT // Setup byte-swapping permute value in ESPERM for POWER9 instruction // emulation macros. #define SETUP_ESPERM(rtmp) \...

2066..2069    ; disallowed                             # 6.3  LEFT-TO-RIGHT ISOLATE..POP DIRECTIONAL ISOLATE
206A..206F    ; disallowed                             # 1.1  INHIBIT SYMMETRIC SWAPPING..NOMINAL DIGIT SHAPES
2070          ; mapped                 ; 0030          # 1.1  SUPERSCRIPT ZERO
2071          ; mapped                 ; 0069          # 3.2  SUPERSCRIPT LATIN SMALL LETTER I

### Features

* ✨ Show a clear error on attempt to include router into itself. PR [#14258](https://github.com/fastapi/fastapi/pull/14258) by [@JavierSanchezCastro](https://github.com/JavierSanchezCastro).
* ✨ Replace `dict` by `Mapping` on `HTTPException.headers`. PR [#12997](https://github.com/fastapi/fastapi/pull/12997) by [@rijenkii](https://github.com/rijenkii).

### Refactors