Complete the documentation and polish the code

src/test/java/io/kamax/mxisd/backend/exec/auth/input/ExecAuthInputMultilinesTest.java

@@ -32,7 +32,7 @@ public class ExecAuthInputMultilinesTest extends ExecAuthStoreTest {
 
     @Override
     protected void setValidInput() {
-        cfg.getAuth().getInput().setType(ExecStore.MultilinesType);
+        cfg.getAuth().getInput().setType(ExecStore.PlainType);
         cfg.getAuth().getInput().setTemplate(null);
     }