fs: change concatenation to template literal
Changed test/parallel/test-fs-copyfile.js
[x] make -j4 test
(UNIX), or vcbuild test
(Windows) passes
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Changed test/parallel/test-fs-copyfile.js
[x] make -j4 test
(UNIX), or vcbuild test
(Windows) passes