Incorrect crumbs for subtables with shared keys

[mpeterv]

local assert = require "luassert"

assert.same(
   {{k = "v1"}, {k = "v2"}},
   {{k = "v1"}, {k = "v3"}}
)

currently produces

lua: test.lua:3: Expected objects to be the same.
Passed in:
(table) {
  [1] = {
   *[k] = 'v1' }
 *[2] = {
   *[k] = 'v3' } }
Expected:
(table) {
  [1] = {
   *[k] = 'v1' }
 *[2] = {
   *[k] = 'v2' } }

Note the incorrect extra asterisks for [1][k]. They disappear if the keys in the subtables are different.