FULL PRODUCT VERSION :
> java --version
java 9-ea
Java(TM) SE Runtime Environment (build 9-ea+156)
Java HotSpot(TM) 64-Bit Server VM (build 9-ea+156, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 10, 64bit

EXTRA RELEVANT SYSTEM CONFIGURATION :
jshell

A DESCRIPTION OF THE PROBLEM :
The output provided by toString is truncated when an instance is created with `new`. This appears to be inconsistent with just printing the instance after that.



STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Save code given in Bugreport.java to open it with jshell.

jshell> /o Bugreport.java //printing board for nine men's morris

class Board {
    @Override
    public String toString() {
        String s = "";
        s += String.format(".-----.-----.\n");
        s += String.format("| | |\n");
        s += String.format("| .---.---. |\n");
        s += String.format("| | | | |\n");
        s += String.format("| | .-.-. | |\n");
        s += String.format("| | | | | |\n");
        s += String.format(".-.-. .-.-.\n");
        s += String.format("| | | | | |\n");
        s += String.format("| | .-.-. | |\n");
        s += String.format("| | | | |\n");
        s += String.format("| .---.---. |\n");
        s += String.format("| | |\n");
        s += String.format(".-----.-----.");
        return s;
    }
}

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
jshell> b // output not truncated
b ==> .-----.-----.
| | |
| .---.---. |
| | | | |
| | .-.-. | |
| | | | | |
.-.-. .-.-.
| | | | | |
| | .-.-. | |
| | | | |
| .---.---. |
| | |
.-----.-----.


ACTUAL -
jshell> Board b = new Board() // output truncated
b ==> .-----.-----.
| | |
| .---.---. |
| | | ... | |
.-----.-----.

REPRODUCIBILITY :
This bug can be reproduced always.