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test this please

• Explain (r-explain)
  • PASS : The goal/problem/solution have been adequately explained in the PR.
  • COMMENTS: also documented in https://lab.civicrm.org/dev/core/issues/319
• Test results (r-test)
  • UNREVIEWED
• Code quality (r-code)
  • PASS: The functionality, purpose, and style of the code seems clear+sensible.
  • COMMENTS: With the understanding that this area of the code is the subject of an ongoing cleanup/refactoring project
• Documentation (r-doc)
  • PASS: The changes do not require documentation.
• Maintainability (r-maint)
  • PASS: The change sufficiently improves test coverage, or the change is trivial enough that it does not require tests.
• Run it (r-run)
  • PASS: I ran:

cv api LocationType.create name="SignificantOther" display_name="Significant Other" 
echo '{"contact_type":"Individual", "first_name":"Foo", "last_name":"Bar", "api.Email.create": [' $(for ltype in {1..6}; do printf '%s' ', {"location_type_id":"' $ltype '", "email":"location_type_' $ltype '@i.oo"}'; done | cut -c3-;) '] }' | cv api --in=json Contact.create
echo '{"name":"locationtypetest","mapping_type_id":"7","api.MappingField.create":[{"name":"email","contact_type":"Individual","column_number":"0","location_type_id":"1","grouping":"1"},{"name":"email","contact_type":"Individual","column_number":"1","location_type_id":"2","grouping":"1"},{"name":"email","contact_type":"Individual","column_number":"2","location_type_id":"3","grouping":"1"},{"name":"email","contact_type":"Individual","column_number":"3","location_type_id":"4","grouping":"1"},{"name":"email","contact_type":"Individual","column_number":"4","location_type_id":"5","grouping":"1"},{"name":"email","contact_type":"Individual","column_number":"5","location_type_id":"6","grouping":"1"}]}' | cv api --in=json Mapping.create

Then exported the contact "Foo Bar" from search results, using mapping "locationtypetest"

• User impact (r-user)
  • PASS: The change would be intuitive or unnoticeable for a majority of users who work with this feature.
• Technical impact (r-tech)
  • PASS: The change preserves compatibility with existing callers/code/downstream.

That's a nice review, @highfalutin! Thanks @eileenmcnaughton and @highfalutin.

I also did an extra iteration of r-run using the steps to reproduce from dev/core#319 -- and confirmed that the email address was exported. 👍

Late to the party, but confirming that it is fixed for my use-cases as well, including for multi-lingual. Thank you!