1 files changed, 5 insertions, 5 deletions
diff --git a/pip/_vendor/html5lib/inputstream.py b/pip/_vendor/html5lib/inputstream.py
index 0ac70bb3a..f3dfd7f3d 100644
--- a/pip/_vendor/html5lib/inputstream.py
+++ b/pip/_vendor/html5lib/inputstream.py
@@ -43,7 +43,7 @@ ascii_punctuation_re = re.compile("[\u0009-\u000D\u0020-\u002F\u003A-\u0040\u005
 charsUntilRegEx = {}
 
 
-class BufferedStream:
+class BufferedStream(object):
     """Buffering for streams that do not have buffering of their own
 
     The buffer is implemented as a list of chunks on the assumption that
@@ -63,11 +63,11 @@ class BufferedStream:
         return pos
 
     def seek(self, pos):
-        assert pos < self._bufferedBytes()
+        assert pos <= self._bufferedBytes()
         offset = pos
         i = 0
         while len(self.buffer[i]) < offset:
-            offset -= pos
+            offset -= len(self.buffer[i])
             i += 1
         self.position = [i, offset]
 
@@ -114,7 +114,7 @@ class BufferedStream:
         if remainingBytes:
             rv.append(self._readStream(remainingBytes))
 
-        return "".join(rv)
+        return b"".join(rv)
 
 
 def HTMLInputStream(source, encoding=None, parseMeta=True, chardet=True):
@@ -132,7 +132,7 @@ def HTMLInputStream(source, encoding=None, parseMeta=True, chardet=True):
         return HTMLBinaryInputStream(source, encoding, parseMeta, chardet)
 
 
-class HTMLUnicodeInputStream:
+class HTMLUnicodeInputStream(object):
     """Provides a unicode stream of characters to the HTMLTokenizer.
 
     This class takes care of character encoding and removing or replacing