Data in Settings section with continuation line (...) is modified, passing that part to a Documentation setting.
We can change in the Grid Editor (Test Suite fields) and save (the saved content may be OK, but when reopening the file, or Applying in Text Editor, it will change).

For example if we type:

*** Settings ***
Suite Setup       Run Keywords    Login And Open Shell as root    AND    Install nmap

And Apply (or reopen), we will see:

*** Settings ***
Documentation     \
...               ANDInstall nmap
Suite Setup       Run Keywords    Login And Open Shell as root

This problem exists at least since v2.1dev19 and in current v2.1dev20