Backport r59047: Fix typo in comment.
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index 6d6e378..aacf19f 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -27,7 +27,7 @@
 class ReadTest(unittest.TestCase):
     def check_partial(self, input, partialresults):
         # get a StreamReader for the encoding and feed the bytestring version
-        # of input to the reader byte by byte. Read every available from
+        # of input to the reader byte by byte. Read everything available from
         # the StreamReader and check that the results equal the appropriate
         # entries from partialresults.
         q = Queue()