[ja] Sync with dfb8688d2e7f4e610de756948c9ca144c95a0723

Removed the note about PHPUnit swallowing output.
[ja] Sync with f21eb7629b09af89eb79d9336fae04bb79d53a56
[ja] Sync with bf35bbc99a7cdb43f35bd1bcccf6cfcb199f4e03

Document that mocks are not automatically verified if generated in a data provider.
[ja] Sync with be7ad522d0ba4503521f98be4e2d7c87436b2cb1

Note that the `at()` matcher works on a per-object basis.