Tab in multi-line input causes org.jline.reader.EOFError

[rmoff]

By default, KSQL CLI will ignore the tab character at the beginning of a new line. However if a multi-line statement is used, a tab will cause an error:

ksql> PRINT \
>Jan 15, 2019 2:34:31 PM org.jline.utils.Log logr
INFO: Error while parsing line
org.jline.reader.EOFError: Escaped new line
        at org.jline.reader.impl.DefaultParser.parse(DefaultParser.java:163)
        at io.confluent.ksql.cli.console.TrimmingParser.parse(TrimmingParser.java:49)
        at org.jline.reader.impl.LineReaderImpl.doComplete(LineReaderImpl.java:3952)
        at org.jline.reader.impl.LineReaderImpl.expandOrComplete(LineReaderImpl.java:3875)
        at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:585)
        at org.jline.reader.impl.LineReaderImpl.readLine(LineReaderImpl.java:404)
        at io.confluent.ksql.cli.console.JLineReader.readLine(JLineReader.java:125)
        at io.confluent.ksql.cli.Cli.readLine(Cli.java:218)
        at io.confluent.ksql.cli.Cli.runInteractively(Cli.java:102)
        at io.confluent.ksql.Ksql.main(Ksql.java:64)

To reproduce the above, enter the keys P R I N T \ <return> <tab>

The reason that this is a problem is that pasted code samples may inadvertently have tabs present, causing a confusing experience for the user.

Confluent Platform 5.1.0

[big-andy-coates]

Tested in master - this is no longer an issue.

@rmoff, would you mind re-testing to ensure you agree, please?

[rmoff]

Tested against master, issue is still present:

[ouertani]

@rmoff could you please check #2734