CELIX-449: Escaping '<' character to achieve valid HTML markup
diff --git a/source/_layouts/celix-md.html b/source/_layouts/celix-md.html
index c1122d6..8335e7e 100644
--- a/source/_layouts/celix-md.html
+++ b/source/_layouts/celix-md.html
@@ -40,7 +40,7 @@
             <div class="col-sm-12 card">

                 <div class="card-body pt-5">

                     <a class="edit-on-gh" href="{{ site.celix_repository_url }}/edit/{{ site.celix_repository_source_branch }}/{{ page.path | replace_first:'celix/','' }}" title="Edit this page on GitHub">Edit on GitHub</a>

-                    <a href="/docs/" title="back to documentation"><< back to documentation</a>

+                    <a href="/docs/" title="back to documentation">&lt;&lt; back to documentation</a>

 

                     {{ content }}

                 </div>

diff --git a/source/_layouts/default.html b/source/_layouts/default.html
index 39f20fb..d374b7f 100644
--- a/source/_layouts/default.html
+++ b/source/_layouts/default.html
@@ -42,7 +42,7 @@
                     <a class="edit-on-gh" href="{{ site.repository_url }}/edit/{{ site.repository_source_branch }}/source/{{ page.path }}" title="Edit this page on GitHub">Edit on GitHub</a>

 

                     {% if page.parent %}

-                    <a href="{{ page.parent.url }}" title="back to {{ page.parent.title }}"><< back to {{ page.parent.title }}</a>

+                    <a href="{{ page.parent.url }}" title="back to {{ page.parent.title }}">&lt;&lt; back to {{ page.parent.title }}</a>

                     {% endif %}

 

                     {{ content }}