Add code:: for the command line and make lxqt-sudo

source/4/4.3/software_sources.rst

@@ -29,6 +29,10 @@ Muon Package Manager -> Settings-> Configure Software Sources
 
 Discover Software Center -> Settings -> Ubuntu (Default) -> Settings (Gear icon) -> Software Sources
 
-command line:    sudo software-properties-qt
+command line:   
 
-tags:ppa, software, download, sources, release, update, discover, muon, security, 
+.. code:: 
+
+    lxqt-sudo software-properties-qt
+
+tags:ppa, software, download, sources, release, update, discover, muon, security,