[JSConf CN Code&Learn] test:Replace string concatenation with template literals
[JSConf CN Code&Learn]
Replace string concatenation in test/async-hooks/verify-graph.js
with template literals.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows [commit guidelines]