yamt opened a new pull request #2654:
URL: https://github.com/apache/incubator-nuttx/pull/2654
## Summary
An empty extension for sed -i is not widely available.
* Where it isn't available (eg. macOS's sed) "sed -i -e" will
create a backup file with the "-e" suffix. It isn't our intention.
* Even GNU sed documentation says it's "not recommended".
## Impact
## Testing
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