Update content

content/tips-tricks/index.md

@@ -37,7 +37,7 @@ files or data that may have been created for a package in the system. If you'd
 like to remove that as well, you can use the purge command. This does not affect
 any data in your home directory.
 
-```
+```none
 $ sudo apt purge meld
 The following packages will be REMOVED:
   meld*

public/index.xml

@@ -200,7 +200,7 @@ files or data that may have been created for a package in the system. If you&amp
 like to remove that as well, you can use the purge command. This does not affect
 any data in your home directory.</p>
 
-<pre><code>$ sudo apt purge meld
+<pre><code class="language-none">$ sudo apt purge meld
 The following packages will be REMOVED:
   meld*
 Do you want to continue? [Y/n] y

public/tips-tricks/index.html

@@ -287,7 +287,7 @@ files or data that may have been created for a package in the system. If you&rsq
 like to remove that as well, you can use the purge command. This does not affect
 any data in your home directory.</p>
 
-<pre><code>$ sudo apt purge meld
+<pre><code class="language-none">$ sudo apt purge meld
 The following packages will be REMOVED:
   meld*
 Do you want to continue? [Y/n] y

public/tips-tricks/index.xml

@@ -48,7 +48,7 @@ files or data that may have been created for a package in the system. If you&amp
 like to remove that as well, you can use the purge command. This does not affect
 any data in your home directory.</p>
 
-<pre><code>$ sudo apt purge meld
+<pre><code class="language-none">$ sudo apt purge meld
 The following packages will be REMOVED:
   meld*
 Do you want to continue? [Y/n] y