fix links

reporting/md-toc

@@ -2,7 +2,7 @@
 
 import argparse
 import sys
-
+import re
 
 def get_opts():
 
@@ -30,11 +30,13 @@ def main():
     bullet = "-"
     counters = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
     lastlev = 0
+    re_anchor = re.compile('[^0-9a-z-]')
     for row in fp:
         if row.startswith("#"):
             headers, title = row.strip().split(" ", 1)
             if opts.l:
-                title = "[{}](#{})".format(title, title.lower().replace(" ", "-"))
+                anchor = re_anchor.sub('' , title.lower().replace(" ", "-"))
+                title = "[{}](#{})".format(title, anchor)
             pad = headers.count("#") - 1
             if pad < lastlev:
                 counters = [x if i <= pad else 0 for i, x in enumerate(counters)]