Correct minor grammatical mistake in open docs (GH-15865)
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 98a55c6..2e385a2 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -1074,8 +1074,8 @@
========= ===============================================================
The default mode is ``'r'`` (open for reading text, synonym of ``'rt'``).
- Modes ``'w+'`` and ``'w+b'`` opens and truncates the file. Modes ``'r+'``
- and ``'r+b'`` opens the file with no truncation.
+ Modes ``'w+'`` and ``'w+b'`` open and truncate the file. Modes ``'r+'``
+ and ``'r+b'`` open the file with no truncation.
As mentioned in the :ref:`io-overview`, Python distinguishes between binary
and text I/O. Files opened in binary mode (including ``'b'`` in the *mode*