Fix duplicating words words. (GH-6296)
Most of them have been added in 3.7.
diff --git a/Doc/library/contextvars.rst b/Doc/library/contextvars.rst
index 1e0987c..abd0d5f 100644
--- a/Doc/library/contextvars.rst
+++ b/Doc/library/contextvars.rst
@@ -253,7 +253,7 @@
addr = writer.transport.get_extra_info('socket').getpeername()
client_addr_var.set(addr)
- # In any code that we call is is now possible to get
+ # In any code that we call is now possible to get
# client's address by calling 'client_addr_var.get()'.
while True: