Method readLine

app/src/main/java/eu/faircode/email/Helper.java:3090–3100

(InputStream is, Charset charset)

    }

    public static String readLine(InputStream is, Charset charset) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        int b = is.read();
        if (b < 0)
            return null;
        while (b >= 0 && b != '\n') {
            bos.write(b);
            b = is.read();
        }
        return new String(bos.toByteArray(), charset);
    }

    static void copy(File src, File dst) throws IOException {
        try (InputStream is = new FileInputStream(src)) {