Cleanup backup files and add them to .gitignore
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
documentation is changed or added -
commit message follows commit guidelines
There seem to be backup files left over in the source tree when npm was updated in PR:https://github.com/nodejs/node/pull/28525
I've added a check in lint Makefile target that attempts to detect these backup files in the future. Maybe better place for it?