[Python-checkins] Fix typo in TypeVar docstring (GH-8142)

[Miss Islington (bot)]

https://github.com/python/cpython/commit/e019f98dc2fdddbee7990e518ead00de2245a0c8
commit: e019f98dc2fdddbee7990e518ead00de2245a0c8
branch: 3.7
author: Miss Islington (bot) <31488909+miss-islington at users.noreply.github.com>
committer: GitHub <noreply at github.com>
date: 2018-07-07T09:05:36-07:00
summary:

Fix typo in TypeVar docstring (GH-8142)


"can be used do declare" → "can be used to declare"
(cherry picked from commit 86bfed372b81b8111a56a3311d537566d5df7f61)

Co-authored-by: João D. Ferreira <jotomicron at gmail.com>

files:
M Lib/typing.py

diff --git a/Lib/typing.py b/Lib/typing.py
index a95eb2e184a0..48992633ac34 100644
--- a/Lib/typing.py
+++ b/Lib/typing.py
@@ -509,7 +509,7 @@ def longest(x: A, y: A) -> A:
     At runtime, isinstance(x, T) and issubclass(C, T) will raise TypeError.
 
     Type variables defined with covariant=True or contravariant=True
-    can be used do declare covariant or contravariant generic types.
+    can be used to declare covariant or contravariant generic types.
     See PEP 484 for more details. By default generic types are invariant
     in all type variables.