As a rule, \ t (TAB) goes to the next tab - this is not a synonym for "n spaces".
I love you XI'm tabbled in. I love you XXXXI'm tabbled in. 0---1---2---3---4---
The current terminal is configured with a freeze frame size 4, which is shown below. "X" are characters that are missing a tab.
So, the first line skips one character with a tab (it goes to tab 3), and the second line writes a space, and then skips four characters (to go to tab 4).
source share