I can no longer use Command + Space inside iTerm2.
I have been using iTerm2 for years, and configured it so that the Command keys acts as the Alt key. I recently applied the security patch for macOS Sierra 10.12.6, and while all other key combinations continue to work, Command + Space is no longer transmitted to the terminal application, which is a pain as it is bound to
set-mark in my favorite environment,
Where can I change this behavior?