in src/main/java/org/apache/maven/plugins/help/EffectivePomMojo.java [218:229]
public String toString(InputLocation location) {
InputSource source = location.getSource();
String s = source.getModelId(); // by default, display modelId
if (StringUtils.isBlank(s) || s.contains("[unknown-version]")) {
// unless it is blank or does not provide version information
s = source.toString();
}
return '}' + s + ((location.getLineNumber() >= 0) ? ", line " + location.getLineNumber() : "") + ' ';
}