Improve parsing of some multiline code blocks

Issue #12

export.py

@@ -68,7 +68,7 @@ def prepare_docx(file_name: str, drawing_dir: str = None) -> bytes:
                 # consider it a code block and mark it with SourceCode style
                 # https://groups.google.com/d/msg/pandoc-discuss/SIwE9dhGF4U/Wjy8zmQ1CQAJ
                 para.style = doc.styles['SourceCode']
-                continue
+                break
             if run.font.name in ['Consolas', 'Courier New']:
                 # Mark with striketrough style to convert to inline code later
                 run.font.strike = True

filter.py

@@ -6,6 +6,7 @@
     run_filter,
     stringify,
     BlockQuote,
+    Cite,
     Code,
     CodeBlock,
     Header,
@@ -104,8 +105,11 @@ def action(elem, doc):
             # in 'A Comparison of Beancount and Ledger' document
             pass
         else:
-            text = stringify(elem)
-            return Code(text)
+            if any(isinstance(item, LineBreak) for item in elem.content):
+                return [*elem.content]
+            else:
+                text = stringify(elem)
+                return Code(text)
 
     elif isinstance(elem, Header):
         # There must be only one level 1 header