More dired-x cleanup.

* lisp/dired-x.el (dired-bind-jump, dired-bind-man, dired-bind-info):
Doc fixes.  Add :set property, replacing top-level calls.
(dired-vm-read-only-folders, dired-vm): Doc fix (drop v. old VM 4).
(dired-guess-shell-gnutar): Test tar version rather than system-type.
(dired-extra-startup, dired-man, dired-info): Doc fixes.
(dired-clean-up-after-deletion): Use when and dolist.
(dired-jump): Use unless and when.
(dired-virtual): Use line-end-position.
(dired-default-directory-alist): Rename from default-directory-alist.
(dired-default-directory): Update for above name change.
(dired-vm): Drop VM < 5 and simplify.
(dired-buffer-more-recently-used-p): Rewrite.
(dired-filename-at-point): Use when and or.
(dired-x-read-filename-at-point): Rename from read-filename-at-point.
Update callers.

* doc/misc/dired-x.texi (Multiple Dired Directories): Update for rename of
default-directory-alist.
(Miscellaneous Commands): No longer mention very old VM version 4.

1 files changed, 7 insertions, 8 deletions

diff --git a/doc/misc/dired-x.texi b/doc/misc/dired-x.texi
index 9ae569c151c..a1e7e0ae9fc 100644
--- a/doc/misc/dired-x.texi
+++ b/doc/misc/dired-x.texi
@@ -978,8 +978,8 @@ A general mechanism is provided for special handling of the working
 directory in special major modes:
 
 @table @code
-@item default-directory-alist
-@vindex default-directory-alist
+@item dired-default-directory-alist
+@vindex dired-default-directory-alist
 Default: @code{((dired-mode . (dired-current-directory)))}
 
 Alist of major modes and their notion of @code{default-directory}, as a
@@ -990,7 +990,7 @@ in favor of @code{default-directory}.
 @findex dired-default-directory
 Use this function like you would use the variable
 @code{default-directory}, except that @code{dired-default-directory}
-also consults the variable @code{default-directory-alist}.
+also consults the variable @code{dired-default-directory-alist}.
 @end table
 
 @node Find File At Point, Miscellaneous Commands, Multiple Dired Directories, Top
@@ -1141,13 +1141,12 @@ file (assumed to be a UNIX mail folder).
 
 @vindex dired-vm-read-only-folders
 If you give this command a prefix argument, it will visit the folder
-read-only.  This only works in VM 5, not VM 4.
+read-only.
 
 If the variable @code{dired-vm-read-only-folders} is @code{t},
-@code{dired-vm} will
-visit all folders read-only.  If it is neither @code{nil} nor @code{t}, e.g.,
-the symbol @code{if-file-read-only}, only files not writable by you are
-visited read-only.  This is the recommended value if you run VM 5.
+@code{dired-vm} will visit all folders read-only.  If it is neither
+@code{nil} nor @code{t}, e.g., the symbol @code{if-file-read-only}, only
+files not writable by you are visited read-only.
 
 @vindex dired-bind-vm
 If the variable @code{dired-bind-vm} is @code{t}, @code{dired-vm} will be bound