Prevent unnecessary MODIFY events in WatchServiceImpl #3524
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Related to #3518
In some cases writing the same content to a file results in a MODIFY event because in an intermediate state the file is truncated to zero length. With this PR prior to emitting a MODIFY event the
WatchServiceImpl
checks whether the hash of the file content at the end of the wait time is the same as before and suppresses the event.Found in CI tests.