Yes we should, to match the parser behaviour you note further on.
One thing I forgot to mention is that it's the same commit mentioned above that also modified the parser not to allow leading whitespaces…
Well the default value in Scintilla is 1 which matches the comment, but then Geany sets it 0 which is correct (IMNAAHO).
You seem to have a lot against leading whitespaces here, far beyond whether we should or shouldn't use them in these specific files, why is that? My personal *feeling* is that we shouldn't *use* them in our conffiles, but that we should support them in the file type; I don't see any reason why to limit this, is there really valid cases where it causes problem to support it? @eht16 as the author of the mentioned commit, can you remember the reason ages later?