Regression: >.... prompt when using dumb terminal

[stephan-gh]

Using LineReader on JLine 1.12.0 produces a >.... prompt instead of the specified prompt
(here: $ ) in dumb terminals. Native terminals do not seem to be affected.

Example code:

LineReader reader = LineReaderBuilder.builder().build();
while (true) {
    reader.readLine("$ ");
}

Run it in IntelliJ IDEA or another dumb terminal, or use the system properties to force a dumb terminal. The >.... prompt is shown instead of $ . It works fine on JLine 1.11.0 and below.

I suspect that #311 is the cause of this, since it added a StringBuilder with that string:
062d25c#diff-10c315592498f1bd016543e7c8d26ab5R3743 (cc @mattirn)

I don't really understand the code this commit changed, so I'm not sure about the purpose of that string for the string builder. It looks somewhat suspicious...

[stephan-gh]

@mattirn Thanks for the patch! I tested #412 and the issue is gone. 👍

[gnodet]

JLine 3.12.1 has been released with this fix.