junit-team/junit — pull request #824 by vbauer (2014-02-17 10:41:00+00:00)
Title: Replace StringBuffer to StringBuilder

StringBuffer is synchronized, StringBuilder is not.
Replacing StringBuffer to StringBuilder could make a **tiny** performance optimization.

Additional information:
StringBuffer: http://docs.oracle.com/javase/7/docs/api/java/lang/StringBuffer.html
StringBuilder: http://docs.oracle.com/javase/7/docs/api/java/lang/StringBuilder.html