Fixed syntax bug

lib/python/StructuredText/DocumentClass.py

@@ -905,7 +905,7 @@ class DocumentClass:
                 return None
             else:
                 # the .. is somewhere else, ignore it
-                return (StructuredTextInnerLink(s[start2+1,end2-1],start2,end2))
+                return (StructuredTextInnerLink(s[start2+1:end2-1],start2,end2))
             return None
         elif expr2(s) and not expr1(s):
             start,end = expr2(s).span()