* revise atan op
* use parametrized vistor API
* use new gtest macros
* Update docs/ops/arithmetic/Atan_1.md
Co-authored-by: Gabriele Galiero Casay <gabriele.galiero.casay@intel.com>
* Update docs/ops/arithmetic/Atan_1.md
Co-authored-by: Gabriele Galiero Casay <gabriele.galiero.casay@intel.com>
* Update ngraph/core/src/op/atan.cpp
Co-authored-by: Gabriele Galiero Casay <gabriele.galiero.casay@intel.com>
* update doc to follow the rules
* create type_prop for atan
* drop op_eval to be covered in backend
* add the missing type prop case
* add integer type ref impl
* fix clang issue
Co-authored-by: Gabriele Galiero Casay <gabriele.galiero.casay@intel.com>
* bulk change `type T` to `type *T*` in spec
* update all `T` which referee to type to use *T* pattern
* get back with `T` where T is dimension
* fix *T*1 -> *T1*
* Make italic types where was no formating