message: Typos and formating fixes.
diff: Using DepthAI Hardware / OAK depth sensors {#tutorial_gapi_oak_devices}
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  @tableofcontents
  @prev_tutorial{tutorial_gapi_face_beautification}
  -![hardwares](pics/oak.jpg)
  +![Oak-D and Oak-D-Light cameras](pics/oak.jpg)
  Depth sensors compatible with Luxonis DepthAI library are supported through OpenCV Graph API (or G-API) module. RGB image and some other formats of output can be retrieved by using familiar interface of G-API module.
  In order to use DepthAI sensor with OpenCV you should do the following preliminary steps:
  --# Install Intel DepthAI library/depthai-core (from here <https://github.com/luxonis/depthai-core>).
  +-# Install Luxonis DepthAI library [depthai-core](https://github.com/luxonis/depthai-core).
  --# Configure OpenCV with DepthAI library support by setting WITH_OAK flag in CMake. If DepthAI library is found in install folders OpenCV will be built with depthai-core (see a status WITH_OAK in CMake log).
  +-# Configure OpenCV with DepthAI library support by setting `WITH_OAK` flag in CMake. If DepthAI library is found in install folders OpenCV will be built with depthai-core (see a status `WITH_OAK` in CMake log).
  -# Build OpenCV.
  