Wrap lines of list items

Paragraphs are usually wrapped at 78 characters per line. This patch
applies that to list items as well. It contains elements from scumop who
posted aaronsw#13 (comment).
But it has been rewritten to fix the amount of newline characters and
increase readability and performance.

html2text.py

@@ -730,6 +730,7 @@ def optwrap(self, text):
         assert wrap, "Requires Python 2.3."
         result = ''
         newlines = 0
+        reList = re.compile('(^[ ]+[0-9]+\. )|(^[ ]+[%s] )' %(self.ul_item_mark))
         for para in text.split("\n"):
             if len(para) > 0:
                 if not skipwrap(para):
@@ -740,6 +741,17 @@ def optwrap(self, text):
                     else:
                         result += "\n\n"
                         newlines = 2
+                # Handle list item
+                elif reList.match(para):
+                    list_prefix = reList.search(para).group()
+                    indent_width = len(list_prefix)
+                    indent_spaces =  ' ' * indent_width
+                    list_width = BODY_WIDTH - indent_width
+                    wrapped = wrap(para, list_width)
+                    result += wrapped[0] + "\n"
+                    for line in wrapped[1:]:
+                        result += indent_spaces + line + "\n"
+                    newlines = 1
                 else:
                     if not onlywhite(para):
                         result += para + "\n"