I have
a simple
record structure consisting of
a header (H) and
a list of the data lines (D) 1:N. All header lines must start with
a digit. All data lines have
a leading whitespace. There also might be some empty lines (E) in between that must be ignored.
L = [H, D, D, E, H, D, E, H, D, D, D].
I would like
…