Merged in NRRPLT-8242-fix-docstrings (pull request #130)

* [NRRPLT-8242] Fix docstrings

* [NRRPLT-8242] Clear trailing whitepaces
* [NRRPLT-8242] Delete trailing whitespace

* look for missing empty line
^( +)\w.*$\n\1:
look for missin descr indent
^( +)(:.*)$\n\1\w


Approved-by: Ugo Albanese