Comment # 10 on bug 423007 from Benjamin Zeller

Actually I did not put it right:

Zypper respects the width reported by the terminal, and wraps to that size if
its smaller than 100, so if you resize your terminal and run zypper --help
again you should see that the zypper output adapts to it. 

In my gnome-terminal it always looks right no matter what I resize it to, same
in xterm.

So 100 is used if:
- The terminal width reported is unlimited
- The terminal width is bigger than 100

For everything smaller than 100, text gets wrapped to the smaller width.