\(ie from the file's end to its beginning).\n
The map is in reverse order because inserting a <style> tag (or any other
string) at `point' invalidates the map for all entries with a greater value of
point. By traversing the map from greatest to least point, we still invalidate
the map as we go, but only those points we have already dealt with (and
therefore no longer care about) will be invalid at any time.\n
\(ie from the file's end to its beginning).\n
The map is in reverse order because inserting a <style> tag (or any other
string) at `point' invalidates the map for all entries with a greater value of
point. By traversing the map from greatest to least point, we still invalidate
the map as we go, but only those points we have already dealt with (and
therefore no longer care about) will be invalid at any time.\n