[MNG-8475] In the loop scenario, StringBuilder is used instead of concatenation

**[Zhongming Hua](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=crazyhzm)** opened **[MNG-8475](https://issues.apache.org/jira/browse/MNG-8475?redirect=false)** and commented


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**Remote Links:**
- [GitHub Pull Request #2014
](https://github.com/apache/maven/pull/2014)

**Backported to:** [4.0.0-rc-3](https://github.com/apache/maven/milestone/28?closed=1)
