Fix SC2145: Argument mixes string and array. Use * or separate argument.
Fix SC2162: read without -r will mangle backslashes.
Fix SC2086: Double quote to prevent globbing and word splitting.
Fix SC2164: Use 'cd ... || exit' or 'cd ... || return' in case cd fails.

This allows us to escape the SugarCube eval() environment and write
normal JavaScript without assigning to the window object.

This reverts merge request !5896

This allows us to escape the SugarCube eval() environment and write
normal JavaScript without assigning to the window object.