How to remove new line from Terminal on launch?

Question

When I launch terminal, it always puts a new line at the beginning first. I am using zsh and did install ohmyzsh, but I can't seem to find anything that would cause this behaviour. Please see attached screenshot. Using powerlevel10k theme.

I checked .bashrc, .zshrc, and every other profile I can think of but can't figure it out.

New tab and pressed return

UPDATE 2: .zshrc BAD CONTENT IDENTIFIED

# Colorise the top Tabs of Iterm2 with the same color as background
# Just change the 18/26/33 wich are the rgb values
echo -e "\033]6;1;bg;red;brightness;18\a"
echo -e "\033]6;1;bg;green;brightness;26\a"
echo -e "\033]6;1;bg;blue;brightness;33\a"

I don't know why these echo commands are causing that behavior, but when I comment out each one, the "new line" is less and less" until I have commented out all three. I got the commands from this medium.com post but it's only supposed to change the tab color. I have removed them now, but tabs are blah. Better than the line spacing.

Answer 1

echo automatically adds a newline to the end of what it prints; since the escape sequence it's printing doesn't actually display anything on screen, this has the effect of printing a blank line. One option is to add the -n option to echo to tell it not to print the newline, but for complicated reasons some versions of echo will just print "-n" as part of their output (and then go ahead and print the newline too). printf is much more reliable for things like this (though it can be more complex to use correctly). See "Why is printf better than echo?" on the Unix & Linux stackexchange.

In this case, you can just replace echo -e with printf, and it should do the same thing but without the unwanted newlines:

printf "\033]6;1;bg;red;brightness;18\a"
printf "\033]6;1;bg;green;brightness;26\a"
printf "\033]6;1;bg;blue;brightness;33\a"

Answer 2

Comment out or remove the following three lines from ~/.zshrc

#echo -e "\033]6;1;bg;red;brightness;18\a"
#echo -e "\033]6;1;bg;green;brightness;26\a"
#echo -e "\033]6;1;bg;blue;brightness;33\a"

Each echo actually creates a new line (on BigSur 11.2.3) and together they create 3 new lines on every new window/tab.