[YouTube] Improve meta info code for review

Author: Stypox

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeMetaInfoHelper.java

@@ -170,41 +170,34 @@ private static void getEmergencyOneboxRenderer(
 
             // usually an encouragement like "We are with you"
             final String title = getTextFromObjectOrThrow(r.getObject("title"), "title");
+
             // usually a phone number
-            final String action;
+            final String action; // this variable is expected to start with "\n"
             if (r.has("actionText")) {
-                action = getTextFromObjectOrThrow(r.getObject("actionText"), "action");
+                action = "\n" + getTextFromObjectOrThrow(r.getObject("actionText"), "action");
             } else if (r.has("contacts")) {
                 final JsonArray contacts = r.getArray("contacts");
                 final StringBuilder stringBuilder = new StringBuilder();
-                int i = 0;
-                final int contactsSize = contacts.size();
-                if (contactsSize != 0) {
-                    // Loop over contacts item from the first contact to the last one, if there is
-                    // not only one, in order to not add an unneeded line return
-                    for (; i < contactsSize - 1; i++) {
-                        stringBuilder.append(getTextFromObjectOrThrow(contacts.getObject(i)
-                                .getObject("actionText"), "contacts.actionText"));
-                        stringBuilder.append("\n");
-                    }
-                    // Add the latest contact without an extra line return
+                // Loop over contacts item from the first contact to the last one
+                for (int i = 0; i < contacts.size(); i++) {
+                    stringBuilder.append("\n");
                     stringBuilder.append(getTextFromObjectOrThrow(contacts.getObject(i)
                             .getObject("actionText"), "contacts.actionText"));
                 }
-
                 action = stringBuilder.toString();
             } else {
-                action = null;
+                action = "";
             }
+
             // usually details about the phone number
             final String details = getTextFromObjectOrThrow(r.getObject("detailsText"), "details");
+
             // usually the name of an association
             final String urlText = getTextFromObjectOrThrow(r.getObject("navigationText"),
                     "urlText");
 
             metaInfo.setTitle(title);
-            metaInfo.setContent(new Description(isNullOrEmpty(action)
-                    ? details : details + "\n" + action, Description.PLAIN_TEXT));
+            metaInfo.setContent(new Description(details + action, Description.PLAIN_TEXT));
             metaInfo.addUrlText(urlText);
 
             // usually the webpage of the association