L10n/i18n tweaks.

plugins/QnA/QnAPlugin.php

@@ -335,7 +335,7 @@ class QnAPlugin extends MicroAppPlugin
                 $form->show();
             }
         } else {
-            $out->text(_m('Question data is missing'));
+            $out->text(_m('Question data is missing.'));
         }
         $out->elementEnd('div');
 

plugins/QnA/actions/qnashowanswer.php

@@ -109,7 +109,9 @@ class QnashowanswerAction extends ShownoticeAction
         $question = $this->answer->getQuestion();
 
         return sprintf(
-            _m('%s\'s answer to "%s"'),
+            // TRANS: Page title.
+            // TRANS: %1$s is the user who answered a question, %2$s is the question.
+            _m('1$%s\'s answer to "%2$s"'),
             $this->user->nickname,
             $question->title
         );