Fix two bugs in #expect_correction
Fix two bugs in #expect_correction

- When an attempt at correcting does not correct anything, just end the
  loop.
- Reset the memoized `@token_table` on each iteration. It would be
  cleaner to use a new `cop` instance on each iteration, but I am not
  sure how to fix that.

maxjacobson/rubocop,jmks/rubocop,deivid-rodriguez/rubocop,tdeo/rubocop,maxjacobson/rubocop,rrosenblum/rubocop,rrosenblum/rubocop,tejasbubane/rubocop,jmks/rubocop,tdeo/rubocop,jmks/rubocop,bbatsov/rubocop,deivid-rodriguez/rubocop,deivid-rodriguez/rubocop,tejasbubane/rubocop,rrosenblum/rubocop,tdeo/rubocop,bbatsov/rubocop,tejasbubane/rubocop,maxjacobson/rubocop