Add `Better Code Line Numbering` list of plugins

Readme.rst

@@ -46,6 +46,8 @@ Auto Pages                Generate custom content for generated Author, Category
 
 Backref Translate         Add a new attribute (``is_translation_of``) to every article/page (which is a translation) pointing back to the original article/page which is being translated
 
+Better code line numbers  Allow code blocks with line numbers to wrap
+
 Better code samples       Wraps all `table` blocks with a class attribute `.codehilitetable` in an additional `div` of class `.hilitewrapper`. It thus permits to style codeblocks better, especially to make them scrollable.
 
 Better figures/samples    Adds a `style="width: ???px; height: auto;"` attribute to any `<img>` tags in the content