038e02d8d9
Summary: **Summary** Remove the extraneous newline when using ldb tool. For example, the subcommand list_column_families will print an empty line to stderr even if there are no errors. **Test plan** Passed make check; manually tested a few ldb subcommands. Pull Request resolved: https://github.com/facebook/rocksdb/pull/6897 Reviewed By: pdillinger Differential Revision: D21819352 Pulled By: gg814 fbshipit-source-id: 5a16a6431bb96684fe97647f4d3ac5bf0ec7fc90