There's been a fair amount of work in the docs tree this time around,

including:

 - Extensive RST conversions and organizational work in the
   memory-management docs thanks to Mike Rapoport.

 - An update of Documentation/features from Andrea Parri and a script to
   keep it updated.

 - Various LICENSES updates from Thomas, along with a script to check SPDX
   tags.

 - Work to fix dangling references to documentation files; this involved a
   fair number of one-liner comment changes outside of Documentation/

...and the usual list of documentation improvements, typo fixes, etc.
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