Input is truncated when \. is inside a string.

[austinhaas-cambia]

Steps to reproduce:

1. Connect to REPL.
2. Enter "\." at the REPL prompt.

Actual behavior:
The REPL responds with a message: "Unsupported escape character: \.", and no prompt is returned.

Expected behavior:
Same error message, but a prompt is returned.

[austinhaas]

Sending a single " will terminate the input and cause a new prompt to be returned.

This isn't an Emacs issue, because:

• According to ngrep -d any port 5555, the complete string is sent.
• This problem can be reproduced directly by launching a REPL with clj and entering "\.".

clojure.core.server/io-prepl has the same behavior.

nRepl and Rebel don't have this problem.

So, there's nothing wrong with what scrim or emacs are doing, but these other REPLs are working around it.

I filed a bug with Clojure here: https://clojure.atlassian.net/browse/CLJ-2575