vlib/v/checker/tests/map_delete.vv:5:11: error: cannot use `int literal` as `string` in argument 1 to `Map.delete`
    3 |         '1': 1
    4 |     }
    5 |     m.delete(1)
      |              ^
    6 |     m.delete(1, 2)
    7 |     m2 := map{
vlib/v/checker/tests/map_delete.vv:6:4: error: expected 1 argument, but got 2
    4 |     }
    5 |     m.delete(1)
    6 |     m.delete(1, 2)
      |       ~~~~~~~~~~~~
    7 |     m2 := map{
    8 |         '1': 1
vlib/v/checker/tests/map_delete.vv:10:2: error: `m2` is immutable, declare it with `mut` to make it mutable
    8 |         '1': 1
    9 |     }
   10 |     m2.delete('1')
      |     ~~
   11 | }