class RepeatUntilExcluding(Subconstruct):
-    """ A version of construct's RepeatUntil that doesn't include the last 
+    """ A version of construct's RepeatUntil that doesn't include the last
         element (which casued the repeat to exit) in the return value.
-        
+
         Only parsing is currently implemented.
-        
+
         P.S. removed some code duplication
     """
     __slots__ = ["predicate"]
             context_for_subcon = context
             if self.subcon.conflags & self.FLAG_COPY_CONTEXT:
                 context_for_subcon = context.__copy__()
-            
+
             while True:
                 subobj = self.subcon._parse(stream, context_for_subcon)
                 if self.predicate(subobj, context):
         raise NotImplementedError('no building')
     def _sizeof(self, context):
         raise SizeofError("can't calculate size")
-
 
     def __init__(self, structs, stream, offset):
         """ Create new abbreviation table. Parses the actual table from the
             stream and stores it internally.
-        
+
             structs:
                 A DWARFStructs instance for parsing the data
-            
+
             stream, offset:
                 The stream and offset into the stream where this abbreviation
                 table lives.
         self.structs = structs
         self.stream = stream
         self.offset = offset
-        
+
         self._abbrev_map = self._parse_abbrev_table()
 
     def get_abbrev(self, code):
 
 
 class AbbrevDecl(object):
-    """ Wraps a parsed abbreviation declaration, exposing its fields with 
+    """ Wraps a parsed abbreviation declaration, exposing its fields with
         dict-like access, and adding some convenience methods.
-        
+
         The abbreviation declaration represents an "entry" that points to it.
     """
     def __init__(self, code, decl):
         self.code = code
         self.decl = decl
-    
+
     def has_children(self):
         """ Does the entry have children?
         """
         """
         for attr_spec in self['attr_spec']:
             yield attr_spec.name, attr_spec.form
-            
+
     def __getitem__(self, entry):
         return self.decl[entry]
-