Generalize documentation helpers

Change-Id: Iaba69a433f25d2160857694b0b434c51c02c0367
diff --git a/templates/doc/faq.html.ep b/templates/doc/faq.html.ep
index 26eb0a3..c44ea22 100644
--- a/templates/doc/faq.html.ep
+++ b/templates/doc/faq.html.ep
@@ -1,12 +1,12 @@
 % layout 'main', title => 'KorAP: Frequently Asked Questions';
 
-<h2 id="tutorial-top">Frequently Asked Questions</h2>
+%= page_title
 
 <p>This document puts together the most frequent questions and issues that we have encountered so far. Please feel welcome to ask further questions via <%= mail_to_chiffre join('@', 'korap', 'ids-mannheim.de'), subject => 'Question via Kalamar', begin %>e-mail<% end %>.
 
 <section>
   <h3>Where is the source code?</h3>
-  <p>Parts of KorAP are already available on <%= doc_ext_link_to 'GitHub', 'https://github.com/KorAP' %>, and we will publish more components in the future.</p>
+  <p>Parts of KorAP are already available on <%= ext_link_to 'GitHub', 'https://github.com/KorAP' %>, and we will publish more components in the future.</p>
 </section>
 
 <section>
@@ -16,7 +16,7 @@
 
 <section>
   <h3>I want to report an issue, how do I do it?</h3>
-  <p>Please refer to our public ticketing system <%= doc_ext_link_to 'for the frontend at GitHub', 'https://github.com/KorAP/Kalamar/issues' %>, to report on any issues. If you don't have a GitHub account, please send us an <%= mail_to_chiffre join('@', 'korap', 'ids-mannheim.de'), subject => 'I found an issue', begin %>e-mail<% end %>.</p>
+  <p>Please refer to our public ticketing system <%= ext_link_to 'for the frontend at GitHub', 'https://github.com/KorAP/Kalamar/issues' %>, to report on any issues. If you don't have a GitHub account, please send us an <%= mail_to_chiffre join('@', 'korap', 'ids-mannheim.de'), subject => 'I found an issue', begin %>e-mail<% end %>.</p>
   %# This option is the preferred one because it gathers some (and will in time gather more) important versioning data.
 </section>