fix readme for code_language

Author: AlexVonB

README.rst

@@ -99,8 +99,8 @@ newline_style
 code_language
   Defines the language that should be assumed for all ``<pre>`` sections.
   Useful, if all code on a page is in the same programming language and
-  should be annotated with ``\`\`\`python`` or similar.
-  Defaults to ``''`` (empty string).
+  should be annotated with `````python`` or similar.
+  Defaults to ``''`` (empty string) and can be any string.
 
 Options may be specified as kwargs to the ``markdownify`` function, or as a
 nested ``Options`` class in ``MarkdownConverter`` subclasses.