[Python-checkins] Fix typo in contextvars docs (#98823)

[AlexWaygood]

https://github.com/python/cpython/commit/72fa57a8fe2e9df637170dc97f994ac70931e8e9
commit: 72fa57a8fe2e9df637170dc97f994ac70931e8e9
branch: main
author: cburroughs <chris.burroughs at gmail.com>
committer: AlexWaygood <Alex.Waygood at Gmail.com>
date: 2022-10-28T22:13:48+01:00
summary:

Fix typo in contextvars docs (#98823)

files:
M Doc/library/contextvars.rst

diff --git a/Doc/library/contextvars.rst b/Doc/library/contextvars.rst
index be1dd0c9eb57..08a7c7d74eab 100644
--- a/Doc/library/contextvars.rst
+++ b/Doc/library/contextvars.rst
@@ -110,7 +110,7 @@ Context Variables
 
       A read-only property.  Set to the value the variable had before
       the :meth:`ContextVar.set` method call that created the token.
-      It points to :attr:`Token.MISSING` is the variable was not set
+      It points to :attr:`Token.MISSING` if the variable was not set
       before the call.
 
    .. attribute:: Token.MISSING