Change processing of <pre><code>

src/docx_converter/html_docx_preprocessor.py

@@ -557,10 +557,10 @@ class HTMLDocxPreprocessor:
         """
         Function to find out:
         what header shouldn't be numbered and can be treated as introduction chapter
-
         Assume  header(s) to be introduction if:
             1. one header not numbered, before 1 numbered header
             2. it is first header from the top level list, and it equals to 'introduction'
+
         Returns
         -------
         None
@@ -665,6 +665,7 @@ class HTMLDocxPreprocessor:
         Function
         - process tags <li>.
         - unwrap <p> tags.
+
         Returns
         -------
         None