Tidy help messages

[jserv]

After the completion of function 'read_startup_ri_file', a trailing
newline character was written into the terminal. Therefore, there was
obviously a blank line between the original 1-2-3 help message and our
own. Using ANSI escape code, we can move cursor to the beginning of
the previous line and then dump the desired messages seamlessly.

[taviso]

Thanks, good point - wish there was an easy way to clean that up, I'm nervous about putting raw control codes in there! Maybe it's okay with isatty() though

[jserv]

Thanks, good point - wish there was an easy way to clean that up, I'm nervous about putting raw control codes in there! Maybe it's okay with isatty() though

Alternatively, we can modify the format string in file root/lotus/123.v10/ri/USA-English/123.ri -- remove the trailing $ character in item 312. And then, everything works perfectly. However, I have no idea how to automate.