I'm using geany as my favourite editor since a few months now. I already posted this issue there in the mailing list, but the developers there told me, that this is an scintilla issue:
I'm working very often with big PHP-Projects, where it is useful to use Doccomments, introduced with /** instead of /*. I think it would be a very nice feature, if this would be shown in another color than the "normal" comments.
Additionally there could be special hilighting or the font would e.g. displayed bold like it was described in 1498421.
It would be really nice if this would be implemented in one if the next Versions, so that a new version could be added to geany where this works.