[3.5] Update multipart.rst (#3903) (#3913)

The boundary should not start with -- in http headers, only in the body. At least according to: https://www.w3.org/Protocols/rfc1341/7_2_Multipart.html (cherry picked from commit 64a8698) Co-authored-by: Ten10 <[email protected]>
aio-libs · Jul 19, 2019 · f73d59a · f73d59a
1 parent 185eca1
commit f73d59a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/docs/multipart.rst b/docs/multipart.rst
@@ -196,7 +196,7 @@ content. Providing `close_boundary = False` prevents this.::
         status=200,
         reason='OK',
         headers={
-            'Content-Type': 'multipart/x-mixed-replace;boundary=--%s' % my_boundary
+            'Content-Type': 'multipart/x-mixed-replace;boundary={}'.format(my_boundary)
         }
     )
     while True: