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### What changes were proposed in this pull request? Improve `toString` by JEP-280 instead of `ToStringBuilder`. ### Why are the changes needed? Since Java 9, String Concatenation has been handled better by default. ID | DESCRIPTION -- | -- JEP-280 | [Indify String Concatenation](https://openjdk.org/jeps/280) Backport https://github.com/apache/spark/pull/51572. ### Does this PR introduce _any_ user-facing change? No. ### How was this patch tested? CI. Closes #3380 from SteNicholas/CELEBORN-2077. Authored-by: SteNicholas <programgeek@163.com> Signed-off-by: Wang, Fei <fwang12@ebay.com> |
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