assertEquals(4, problems.messages.size());
        assertContains(problems.messages.get(0), "'mirrors.mirror.id' must not be 'local'");
        assertContains(problems.messages.get(1), "'mirrors.mirror.url' for local is missing");
        assertContains(problems.messages.get(2), "'mirrors.mirror.mirrorOf' for local is missing");

            description.appendText("was a ProjectBuildingResult with messages ");
            String messages = r.getProblems().stream()
                    .map(ModelProblem::getMessage)
                    .map(m -> "\"" + m + "\"" + System.lineSeparator())
                    .collect(joining(", "));
            description.appendText(messages);
        }
    }

     * @param cause The cause of the problem, may be {@code null}.
     */
    void add(Problem.Severity severity, String message, int line, int column, Exception cause);

    /**
     * The next messages will be bound to this source. When calling this method again, previous messages keep
     * their source, but the next messages will use the new source.
     *
     * @param source a source
     */
    void setSource(String source);

          <include>driver.properties</include>
        </includes>
      </testResource>
      <testResource>
        <directory>src/messages</directory>
        <targetPath>org/apache/maven/messages</targetPath>
        <includes>
          <include>messages*.properties</include>
        </includes>
      </testResource>
    </testResources>
  </build>

          <include>driver.properties</include>
        </includes>
      </resource>
      <resource>
        <directory>/src/messages</directory>
        <targetPath>org/apache/maven/messages</targetPath>
        <includes>
          <include>messages*.properties</include>
        </includes>
      </resource>
    </resources>
  </build>

  <reports>
    <report>maven-jdepend-plugin</report>

     * and providing a <code>message</code>.
     */
    public MojoException(String message, Throwable cause) {
        super(message, cause);
    }

    /**
     * Construct a new <code>MojoExecutionException</code> exception providing a <code>message</code>.
     */
    public MojoException(String message) {
        super(message);
    }

    /**

 * under the License.
 */
package org.apache.maven.internal;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

/**
 * Helper class to format multiline messages to the console
 */
public class MultilineMessageHelper {

    private static final int DEFAULT_MAX_SIZE = 65;
    private static final char BOX_CHAR = '*';

         * the way 2.x works. When we're in strict mode, the removal of duplicates just saves other merging steps from
         * aftereffects and bogus error messages.
         */
        List<Dependency> dependencies = model.getDependencies();
        Map<String, Dependency> normalized = new LinkedHashMap<>(dependencies.size() * 2);

        for (Dependency dependency : dependencies) {

    If you feel the source code should be reformatted, create a separate PR for this change.
  + Check for unnecessary whitespace with `git diff --check` before committing.
+ Make sure your commit messages are in the proper format. Your commit message should contain the key of the JIRA issue.
```
[MNG-XXX] - Subject of the JIRA Ticket
 Optional supplemental description.
```

 with its <<<DefaultExceptionHandler>>> implementation
 ({{{./xref/org/apache/maven/exception/DefaultExceptionHandler.html}source}}), use to transform exception into useful end-user messages.

* Toolchains

 * {{{./toolchains.html}Toolchains descriptor reference}},