Add a test for large search/replace failure.
Use the STDOUT saving technique so tests can pass.

The wp aliases in my PATH made me oblivious before...
Add a test for the case when the replacement contains the search string.

In this case the current code works, but alternatives I was considering
might not.

Also removed the small test - that case is already covered.
Adjust chunking based on whether the replacement contains the search string.
Generate only as many posts as needed to test chunking.
Revert "Adjust chunking based on whether the replacement contains the search string."

This reverts commit 45770c2d2fef4da9021ef458e4ef55504a7b5872.
Add a dry run test to make sure the iterator doesn't depend on updates.
Reduce chunk offset to account for updated rows.
Merge pull request #473 from cyberhobo/fix-incomplete-search-replace

Replace all occurrences in large search-replace operations