RFR JDK-8169595: jshell tool: pasting multiple lines hangs input

[Jan Lahoda]

Hi,

There's a code in jdk.internal.le to query cursor position. This is done 
by writing an escape code to the output, and reading an escape code with 
the cursor position from the input. As the input may also contain user's 
input, the read text may look like "<user-input>\033[72;9R". There is a 
regexp pattern to recognize the cursor position code, but it won't match 
the text if <user-input> contains line endings.

This patch adds DOTALL to the pattern, so it will match the user's input 
even if it is multi-line.

Bug: https://bugs.openjdk.java.net/browse/JDK-8169595
Webrev: http://cr.openjdk.java.net/~jlahoda/8169595/webrev.00/

Any comments are welcome!

Thanks,
     Jan