Prefer EndsWith matcher in exception_wrapper test
Prefer EndsWith matcher in exception_wrapper test

Summary: [Folly] Prefer `EndsWith` matcher in `exception_wrapper` test so that, in case of failure, the non-matching input will be shown.

Differential Revision: D21708674

fbshipit-source-id: 022f7d64a030417b80b8796ae3d78534295509fc

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly