fix for duplicate prompt and long lines

[bo-tato]

• addresses https://github.com/nonsequitur/inf-ruby/issues/49 by sending as a single line string with newlines escaped, rather than multiple lines which cause duplicate intermediate prompts to be displayed
• addresses https://github.com/nonsequitur/inf-ruby/issues/172 by checking comint-max-line-length and if the line is too long, then it writes to a temporary file, and has ruby read and eval and delete the temporary file rather than using comint-send-string

I made ruby-send-string as a public interactive function as python and clojure and lisp modes have it, I don't personally use it interactively with those languages but I sometimes bind a key to lang-send-string to send a command to restart a service or whatever other action I'm repeatedly doing.

[bo-tato]

I just realized both the python-mode implementation and this, have the problem that send no longer works for large regions over tramp, as it creates the temp file locally.

[bo-tato]

I added a check if the filename is remote, then just do the old behavior and get duplicate prompts but working. But actually it doesn't matter because inf-ruby doesn't currently support tramp to begin with? IE if you are editing a file over tramp and do run-python it will run python repl on that remote host, but if you are editing a file over tramp and do inf-ruby it spawns irb on your local computer, and I can't see an option to spawn a remote ruby and connect it with inf-ruby

[bo-tato]

I was confused, inf-ruby does work fine over tramp, and I was getting an error with python on tramp for a different reason, it does have logic for creating the temp file remote which I copied. So this is working over tramp now also

[bo-tato]

and one more small fix as it wasn't deleting the temp file over tramp cause the filename had the /ssh prefix

[dgutov]

Nice work! A couple notes inline.

[dgutov]

and has ruby read and eval and delete the temporary file rather than using comint-send-string

I think the temp file isn't ultimately deleted, though?

EDIT: Ah no, I just missed that line.

[bo-tato]

Thanks! I'm fairly new at emacs lisp so any improvements are more than welcome

[dgutov]

Thanks again!