Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/Documentation/filesystems/autofs4-mount-control.txt b/Documentation/filesystems/autofs4-mount-control.txt
index 51986bf..4c95935 100644
--- a/Documentation/filesystems/autofs4-mount-control.txt
+++ b/Documentation/filesystems/autofs4-mount-control.txt
@@ -309,7 +309,7 @@
 AUTOFS_DEV_IOCTL_TIMEOUT_CMD
 ----------------------------
 
-Set the expire timeout for mounts withing an autofs mount point.
+Set the expire timeout for mounts within an autofs mount point.
 
 The call requires an initialized struct autofs_dev_ioctl with the
 ioctlfd field set to the descriptor obtained from the open call.