Issue #25161: Add full stops in documentation; patch by Takase Arihiro
diff --git a/Doc/library/platform.rst b/Doc/library/platform.rst
index e27f2ad..66b6892 100644
--- a/Doc/library/platform.rst
+++ b/Doc/library/platform.rst
@@ -117,7 +117,7 @@
 
 .. function:: python_version()
 
-   Returns the Python version as string ``'major.minor.patchlevel'``
+   Returns the Python version as string ``'major.minor.patchlevel'``.
 
    Note that unlike the Python ``sys.version``, the returned value will always
    include the patchlevel (it defaults to 0).