Unlike go test, the testscript command prints a blank line before either 'PASS' or 'FAIL' and its other output:

testscript test.txtar

PASS

This makes it awkward to use in a loop over many scripts, one at a time. For example:

for TS in *.txtar; do
    echo -n "${TS}... "
    testscript ${TS}
done

The desired output is:

    test1.txtar... PASS
    test2.txtar... PASS
    ...

But instead, with this leading newline, we see:

    test1.txtar...
    PASS
    test2.txtar...
    PASS
    ...

This commit removes the newline.