Just tried in sage cloud worksheet...(first example with csv_table).
Yes : very nice :-)
I tried to put another decorator (=custom-mode=magic) %md with text at the end of cell but not working (displaying the CSV table before chaining to a Markdown display).
I am not surprised : I guess text data until end of cell, is the "entry" (=stdin) of the command (program or function), and stored into the string "str" parameter
Dominique.