minor edit, use +=

gpshead · web-flow · commit afd92ab6a8eb · 2022-09-30T11:08:59.000-07:00
diff --git a/Lib/gzip.py b/Lib/gzip.py
@@ -514,7 +514,7 @@ def read(self, size=-1):
                                "end-of-stream marker was reached")
 
         self._crc = zlib.crc32(uncompress, self._crc)
-        self._stream_size = self._stream_size + len(uncompress)
+        self._stream_size += len(uncompress)
         self._pos += len(uncompress)
         return uncompress
 
