clearify doc for same filesystems

borg/archiver.py

@@ -1373,7 +1373,7 @@ class Archiver:
                                help='write checkpoint every SECONDS seconds (Default: 300)')
         subparser.add_argument('-x', '--one-file-system', dest='one_file_system',
                                action='store_true', default=False,
-                               help='stay in same file system, do not cross mount points')
+                               help='stay in same file system')
         subparser.add_argument('--numeric-owner', dest='numeric_owner',
                                action='store_true', default=False,
                                help='only store numeric user and group identifiers')

docs/usage/create.rst.inc

@@ -58,7 +58,7 @@ borg create
       -c SECONDS, --checkpoint-interval SECONDS
                             write checkpoint every SECONDS seconds (Default: 300)
       -x, --one-file-system
-                            stay in same file system, do not cross mount points
+                            stay in same file system
       --numeric-owner       only store numeric user and group identifiers
       --noatime             do not store atime into archive
       --noctime             do not store ctime into archive