DSBugBash: Support for Code Cell Titles

[DonJayamanne]

Create a cell as follows:

#%% Wow
import sys
print(sys.executable)

I would expect the cell in the interative window to have a title of Wow.
Right now it displays the cell with the comments.

Currently we have the text #%% ... being displayed in the interactive window, only when there's text after #%%.

[ronglums]

In this case, "Wow" will show up at the first line.