Merge pull request #18 from apache/elharo-patch-1

docs: grammar

Author: elharo

src/main/java/org/apache/maven/plugins/jar/TestJarMojo.java

@@ -53,7 +53,7 @@ public class TestJarMojo
     private File testClassesDirectory;
 
     /**
-     * Classifier to used for {@code test-jar}.
+     * Classifier to use for {@code test-jar}.
      */
     @Parameter( defaultValue = "tests" )
     private String classifier;