Swift readLine() scripting function not usable

[philipturner]

Although %system commands now support user input, this wasn't extended to the LLDB process. Swift code can write to output with print(), but can't read through readLine(). Any libraries that call this function will be affected.

As an alternative to this kind of interaction, ask the user to paste a string into an empty cell. Design the notebook with a drop-down feature that closes the cell, or ask the user to delete it after running. For larger input, the user can connect to their Google Drive to import .txt or .csv files.