idlwave-shell-use-input-mode-magic

idlwave-shell-use-input-mode-magic is a variable defined in `idlw-shell.el'.
Its value is

nil

Documentation:
Non-nil means, IDLWAVE should check for input mode spells in output.
The spells are strings printed by your IDL program and matched
by the regular expressions in `idlwave-shell-input-mode-spells'.
When these expressions match, IDLWAVE switches to character input mode and
back, respectively. See `idlwave-shell-input-mode-spells' for details.

You can customize this variable.