Damian Johnson:
Hi nusenu, tor's manual says [1]...
"To split one configuration entry into multiple lines, use a single backslash character () before the end of the line. Comments can be used in such multiline entries, but they must start at the beginning of a line."
Thank you Damian! Reading the above I didn't expect that you can create a multiline entry without "" before the end of the line.
Now I'll play around to see how this works if a single multiline entry is split across multiple included files.