* remove the out args

* update log docs

* update log1p docs

* Add the max, min, maximum, minimum api for the paddle 2.0

update the api doc for the cumsum op 

update the sort api, delete the unused index output

 Fix the compare ops doc for the api2.0

Fix the argsort, sort the api doc for paddle2.0

* add cholesky_cn

* add dot, inverse, test=document

* fix doc, test=document

* fix doc, test=document

fix cross op doc for API2.0

Add new operator api: paddle.histc(input, bins=100, min=0, max=0)

Add index sample op cn doc

* test=develop, add_tril_op

* test=develop, polish_addmm_op

* test=develop, add_triu_op

* test=develop, polish tril and triu

* add cn doc of unbind API

Add the Chinese doc for the api of equal, linspace, matmul

* Implement the chinese documentation of inverse.

* Add the documentation of error type.

* Remove the example of static graph.

add the doc of chinese document randint