apt-get installation prompt on ubuntu 18.04 does not work

[Shraiysh Vaishay]

OS : Ubuntu 18.04 LTS
Package version : 2.6.1-0~201808202208~ubuntu18.04.1

What I did : I went to the URL https://launchpad.net/~rednotebook/+archive/ubuntu/stable and copied the line `sudo apt-get install rednotebook` by triple clicking on any one letter. This takes the new-line characters(2 in this case) with the line and so when I put this command on my terminal, the first new-line character works as the Enter key, but the second new line character goes with 'y' or 'Y' when asked for permission. As \nY is not same as Y, it aborts.

`After this operation, 2,160 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Abort.`

Expected : The setup should continue.

Happened : The setup aborts due to a possible extra new-line character.

Can we ignore the new-line characters which come with prompt response to get user's correct opinion on Y/n?

[Jendrik Seipp (jendrikseipp)]

This behaviour is caused by the "apt" program, not by RedNotebook.

[Julian Andres Klode (juliank)]

We do not care about the case of the expression, so both y and Y do work. Are you sure there has not been any other input before the Y like a space?

[Shraiysh Vaishay (shraiysh)]

I've edited the question. Thanks @juliank for the comment. It was possibly a white space character there!