* NEWS: Document --no-check-device and --check-device.

* doc/rendition.texi: Change the way FIXME-*refs are handled in
!PROOF.
* doc/intern.texi, doc/tar.texi: Update.
* doc/untabify.el: New file.
* doc/Makefile.am (EXTRA_DIST): Add untabify.el
(untabify, final, check-format, check-refs, check-fixmes)
(check-unrevised, all-check-docs, check-docs): New rules.

NEWS

@@ -1,4 +1,4 @@
-GNU tar NEWS - User visible changes. 2008-02-08
+GNU tar NEWS - User visible changes. 2008-03-27
 Please send GNU tar bug reports to <bug-tar@gnu.org>
 
 
@@ -27,6 +27,18 @@ of `--checkpoint-action' options can be specified, the actions will be
 executed in order of their appearance in the command line.  See
 chapter 3.8 "Checkpoints" for a complete description.
 
+* New options --no-check-device, --check-device.
+
+The `--no-check-device' option disables comparing device numbers during
+preparatory stage of an incremental dump.  This allows to avoid
+creating full dumps if the device numbers change (e.g. when using an
+LVM snapshot).
+
+The `--check-device' option enables comparing device numbers.  This is
+the default.  This option is provided to undo the effect of the previous
+`--no-check-device' option, e.g. if it was set in TAR_OPTIONS
+environment variable.
+
 * The --transform option.
 
 Any number of `--transform' options can be given in the command line.