Partial backport of 612f34e31270: fix spacing error in exception message.
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index 0035e70..d6f9f9a 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -1066,8 +1066,8 @@
if request.data is not None: # POST
data = request.data
if isinstance(data, str):
- msg = "POST data should be bytes or an iterable of bytes."\
- "It cannot be str"
+ msg = "POST data should be bytes or an iterable of bytes. "\
+ "It cannot be of type str."
raise TypeError(msg)
if not request.has_header('Content-type'):
request.add_unredirected_header(