ctrl+alt+punctuation not properly send to the underlying program

[robinmoussu]

In short ctrl+alt+key is not properly send to application when using zelij.

Step to reproduce:

• open nvim
• press i to enter in insert mode
• press ctrl+v to enter in literal mode (it will insert the next character as-it)
• press ctrl+alt+, (also reproducible with ctrl+alt+.)

The ctrl+alt+, assume that you are using a QWERTY-US keyboard, I have tested 2 European layouts, they have the same issue. It seems to trigger with most punctuation symbols.

All tests with zellij were started with zellij setup --clean.

What should happen:

• the string <M-C-,> should be inserted (M stands for meta == alt key, C for control, and its in between bracket because they are all pressed at the same time).

What happens:

• without zellij, using either wizterm or iterm2 it does work (wizterm and iterm2 and MacOS terminal emulator)
• with zellij, using wizterm, the string <M-,> is inserted (the C for control is missing)
• with zellij, using iterm2, the term freeze and the only way to resurrect it (that I found), was to open a new terminal and re-attach the zellij session

I have the same issue when connecting from my mac to a linux machine via ssh then starting zellij on the Linux side.

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• OS: MacOs Monterey 12.7.4
• zellij 0.40.1 installed with cargo install
• tested with