* fix some en doc test=develop test=document_fix

* fix new fluid.data API.spec test=develop test=document_fix

* fix typo test=develop, test=document_fix

* fix typo test=develop test=document_fix

* fix typo test=develop test=document_fix

* fix test=develop test=document_fix

* fix according review test=develop test=document_fix

* fix review test=develop test=document_fix

* fix according review advice test=develop test=document_fix

* fix the doc  test=develop test=document_fix

* fix API.spec test=develop test=document_fix

refine en api doc of [shape, scale, split, selu, soft_relu, scatter], test=develop, test=document_fix (#20264) (#20458)

* add new save load interface; test=develop

* add new save interface; test=develop

* add save load interface ;

* fix save load error;

* fix dygraph set dict bug;

* add save load unit test; test=develop

* fix test_imperative_optimizer bug; test=develop

* fix unitest optimizer bug; test=develop

* fix code coverage; test=develop

* fix converage; test=develop

* add document for apis; test=develop

* fix unitest error; test=develop

* fix save load unit test error; test=develop

* fix error message; test=develop

* change set_parameter set_optimizer to save_dygraph; test=develop

* add load_graph check; test=develop

* fix api spec; test=develop

Fix the api input type and data dtype check in the op of sign
test=release/1.6

* fix the reduce api en doc test=document_fix test=develop

* fix the fluid.data test=develop test=document_fix

* fix the API.spec test=develop test=document_fix

* fix according the review test=develop test=document_fix

* fix the confilict test=develop test=document_fix

update the api en_doc of has_inf, has_nan, cumsum, double_buffer and mul

* add api check in fc test=develop

* enforce shape error info of sum op test=develop

* fix spelling test=develop

* print x_dims info test=develop

* enhance shape error info test=develop

test=release/1.6, test=document_fix

test=release/1.6, test=document_fix

test=release/1.6, test=document_fix

* refine en doc. test=develop. test=document_fix

enhance shape error messages for reshape op.
test=release/1.6

test=release/1.6

* cherry-pick fix en doc test=develop test=document_fix

* roll back fsp_matrix hash test=develop test=document_fix

test=release/1.6, test=document_fix

* Fix some english doc api, shenze tools group, cherry-pick(#20300)
test=release/1.6
test=document_fix

* remote the unless change from cherry-pick
test=release/1.6
test=document_fix

* Merge branch 'develop' of https://github.com/PaddlePaddle/Paddle into api_fix

* test=release/1.6, test=document_fix

* fix en api doc test=develop test=document_fix test=document_preview

* update api.spec  test=develop test=document_fix test=document_preview

* fix some details  test=develop test=document_fix test=document_preview

* update API.spec test=document_fix test=document_preview  test=develop

* cherry pick for 131b1dc3, test=develop, test=document_fix

* cherry pick for fb21a743, test=develop, test=document_fix

[cherry-pick]fix English document of expand/pow/reshape/slice. test=release/1.6, test=document_fix (#20280) (#20356)

* fix api 1.6 doc bpr, data_norm teacher_student

* Polish english apis' doc (#20198)

* refine Normal Uniform documnet

* refine eng doc, test=release/1.6, test=document_fix

* refine fc/seq_conv/seq_concat en doc test=develop, test=document_fix

* refine seq_pool/reshape/reverse test=develop, test=document_fix (#20233)

* fix en_doc api of one-hot and embedding (#20187)

* Add detailed error messages for nce layer

* Fix some problems

* Fix unit test coverage

test=release/1.6

* [cherry-pick] modified doc of group_norm, test=release/1.6, test=document_fix (#20234)

* [cherry-pick] modified doc of crop_tensor, test=release/1.6, test=document_fix (#20203)

* Update apiexample (#20247), test=develop, test=document_fix

* update api example, test=develop, test=document_fix

* update api.spec, test=release/1.6, test=document_fix

* fix APIs,test=develop,test=document_fix

* fix conflict, test=develop, test=document_fix

* fix confict, test=develop, test=document_fix

* fix confict, test=develop, test=document_fix

* fix API.spec, test=develop, test=document_fix

* change fluid.layers.data to fluid.data,test=develop, test=document_fix

* fix bug on example code, test=develop, test=document_fix

* fix API.spec,  test=develop, test=document_fix

* fix the error message for reduce_mean and reduce_sum op (#20063)

* fix the error message for reduce_mean and reduce_sum op test=develop

* fix typo test=develop

* fix according review advice test=develop

* fix the test test=develop

* fix test=develop

* Fill constant error message fix (#20075)

* fix the constant error message test=develop

* fix typo test=develop

* fix typo test=develop

* fix code style test=develop

* fix comment and bugs test=develop

* fix the bug test=develop

* fix and add unittest test=develop

* fix the typo test=develop

* add support for the fill_constant op test=develop

* add test for ci coverage test=develop

test=release/1.6, test=document_fix

* update en doc

* add error log

* Update crf_decoding api & example

* Update api spec

* Fix linear chain crf api

* Avoid sharing data pointer with input

* Simplify the logic in linear_chain_crf_decoding

* Add unittest for crf_decoding when label & path both are set

* Update API spec

* Add unittest for layers && correct infer_shape in chunk_eval

test=release/1.6

1.support asymmetric padding;
2.support padding algorithm:"SAME" and "VALID";
3.support channel_last: data_format NHWC and NDHWC;
4.change doc of python API and c++;

test=release/1.6

* refine doc, test=document_fix

* add API.spec,test=develop,test=document_fix