sentence method
Implementation
String sentence(int length) {
final wordList = <String>[];
for (var i = 0; i < length; i++) {
var w = word();
if (i < length - 1 && random.nextInt(10) == 0) {
w += ',';
}
wordList.add(w);
}
final text = '${wordList.join(' ')}.';
return text[0].toUpperCase() + text.substring(1);
}