Thanks Yutaka,
Your suggestion cannot be used universally. e.g., when my legacy code has some commented-out segments, they now come back to life. Also, frames such as:
#########
#
#########
are considered “code”.
But your syntax does refer to RegEx:
#Keyword color=4,word=on,rightall=off,case=off,insidetag=off,regexp=off,rightall2=off
What does regexp=on do?
And finally, Can the RegEx-enhanced syntax highlighting files be moved up your priority list please?