Add PrependNewLine extension for Markdown processing

.gitignore

@@ -1,4 +1,3 @@
 www/
 __pycache__/
-prependnewline.py
 *.tar

prependnewline.py

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+# https://gitlab.com/ayblaq/prependnewline
+"""
+====================================
+Markdown PrependNewLine Extension
+====================================
+:copyright: Copyright 2019 Ayobami Adewale
+:license: MIT, see LICENSE for details.
+
+"""
+
+from __future__ import absolute_import
+from __future__ import unicode_literals
+from markdown.extensions import Extension
+from markdown.preprocessors import Preprocessor
+
+
+class PrependNewLineExtension(Extension):
+    """ PrependNewLine Extension for Python-Markdown. """
+
+    def extendMarkdown(self, md):
+        """ Insert PrependNewLinePreprocessor before ReferencePreprocessor. """
+        md.preprocessors.register(PrependNewLinePreprocessor(md), 'prependnewline', 12)
+
+
+class PrependNewLinePreprocessor(Preprocessor):
+    """ PrependNewLine Preprocessor - finds list in a document and prepends a newline. """
+
+    def run(self, lines):
+        '''
+        Find all list from the text.
+        Each reference is prepended with a new line.
+        '''
+        new_text = []
+        for line in lines:
+            if len(line) > 0:
+                if (line[0].isdigit() or line[0] == '*') and line[len(line) - 1] != '*':
+                    line = '\n' + line
+            new_text.append(line)
+        return new_text
+
+
+def makeExtension(**kwargs):  # pragma: no cover
+    return PrependNewLineExtension(**kwargs)