removed use of 'echo -n' (and echo -n -e ...)

removed use of 'echo -n' (and echo -n -e ...)

In most cases used printf %s ... instead.

echo -n > file  lines to create empty / truncate files were
changed to : > file lines, like done in in test-lib-emacs.sh

And one echo -n "  " replaced with use of sed "s/^/  /" in next line.