title: Angular Material Chip Input with comma as separator wont allow '<' (less than)
body: <p>In the <a href="https://stackblitz.com/angular/lyqkbervyjy?file=app%2Fchips-input-example.ts" rel="nofollow noreferrer">material</a> example of Chips with input they use Enter and Comma as keys to trigger an Add event. However, it doesnt seem to be able to tell the difference between COMMA and SHIFT+COMMA. This results in me not being able to enter a '&lt;' less than symbol in the field. Is there a way I can specify only nonshifted commas should Add the chip?</p>