clarify that islink only really works if python knows about symlinks (closes #13143)

Patch from Yayoi Ukai.

diff --git a/Doc/library/os.path.rst b/Doc/library/os.path.rst
index 6b3a3b64915ad93fd486f8b25e29801e5d2ac4a3..dc03f4342281ccc878d705f3e15fea7841fb26f9 100644 (file)
--- a/Doc/library/os.path.rst
+++ b/Doc/library/os.path.rst
@@ -188,7 +188,7 @@ the :mod:`glob` module.)
 .. function:: islink(path)
 
    Return ``True`` if *path* refers to a directory entry that is a symbolic link.
-   Always ``False`` if symbolic links are not supported.
+   Always ``False`` if symbolic links are not supported by the python runtime.
 
 
 .. function:: ismount(path)