ComJam, IMHO mehthinks you are just being silly now
simplistically - fly runway hdg and / or, fly straight ahead... (when called before Take off) = if you maintain the extended track for the runway the ATCO will be a happy bunny. Maintain heading = maintain heading
KISS, disappearing up one's own bottom is generally to be avoided
Tis the same semantics as affirm Vs affermative, the words change the desired effect remains the same