Fix simple typo in httpclient exception message

Unelss should be unless

diff --git a/tornado/simple_httpclient.py b/tornado/simple_httpclient.py
index ffa03ea686659a76e6cc6117f8f689933962ef94..f3cb1b8666f47b8504c7e5e12975bb19040a1332 100644 (file)
--- a/tornado/simple_httpclient.py
+++ b/tornado/simple_httpclient.py
@@ -331,7 +331,7 @@ class _HTTPConnection(httputil.HTTPMessageDelegate):
             if ((body_expected and not body_present) or
                     (body_present and not body_expected)):
                 raise ValueError(
-                    'Body must %sbe None for method %s (unelss '
+                    'Body must %sbe None for method %s (unless '
                     'allow_nonstandard_methods is true)' %
                     ('not ' if body_expected else '', self.request.method))
         if self.request.expect_100_continue: