4959: Syntax highlighting for documentation comments on macro definitions r=matklad a=ltentrup Two minor changes with regards to syntax highlighting of comments attached to macro definitions. Before <img width="290" alt="Bildschirmfoto 2020-06-20 um 00 05 19" src="https://user-images.githubusercontent.com/201808/85182705-c561b500-b289-11ea-944e-0bdf6508a44f.png"> After <img width="288" alt="Bildschirmfoto 2020-06-20 um 00 03 36" src="https://user-images.githubusercontent.com/201808/85182727-d90d1b80-b289-11ea-9d2d-234731f19302.png"> Fixes #4949 Co-authored-by: Leander Tentrup <leander.tentrup@gmail.com>