border-corner-square

<svg
  xmlns="http://www.w3.org/2000/svg"
  width="24"
  height="24"
  viewBox="0 0 24 24"
  fill="none"
  stroke="currentColor"
  stroke-width="2"
  stroke-linecap="round"
  stroke-linejoin="round"
><path stroke="none" d="M0 0h24v24H0z" fill="none" /><path d="M4 20v-15a1 1 0 0 1 1 -1h15" /></svg>

<i class="ti ti-border-corner-square"></i>

ti ti-border-corner-square

<i class="ti ti-003566"></i>

ti ti-003566

<svg
  xmlns="http://www.w3.org/2000/svg"
  width="24"
  height="24"
  viewBox="0 0 24 24"
  fill="none"
  stroke="currentColor"
  stroke-width="2"
  stroke-linecap="round"
  stroke-linejoin="round"
><path stroke="none" d="M0 0h24v24H0z" fill="none" /><path d="M4 20v-15a1 1 0 0 1 1 -1h15" /></svg>

<svg
  xmlns="http://www.w3.org/2000/svg"
  width="24"
  height="24"
  viewBox="0 0 24 24"
  fill="none"
  stroke="currentColor"
  stroke-width="2"
  stroke-linecap="round"
  stroke-linejoin="round"
><path stroke="none" d="M0 0h24v24H0z" fill="none" /><path d="M4 20v-15a1 1 0 0 1 1 -1h15" /></svg>

https://cdn.jsdelivr.net/npm/@ticnob/icons@1/icons/border-corner-square.svg