* indent.el: Provide interactive indent-rigidly mode. Use lexical-binding.

(indent-rigidly--current-indentation): New function.
(indent-rigidly-map): New var.
(indent-rigidly): Use it to provide interactive mode.
(indent-region): Add progress reporter.
(tab-stop-list): Make it implicitly extend to infinity by repeating the
last step.
(indent--next-tab-stop): New function to implement this behavior.
(tab-to-tab-stop, move-to-tab-stop): Use it.

Fixes: debbugs:8196

1 files changed, 7 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 560c54c0f83..00e47907cde 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -163,6 +163,13 @@ and this variable has been marked obsolete.
 
 * Editing Changes in Emacs 24.4
 
+** C-x TAB enters a transient interactive mode.
+You can then use the left/right cursor keys to move the block of text.
+
+** `tab-stop-list' is now implicitly extended to infinity.
+Its default value is changed to nil which means a tab stop every
+`tab-width' columns.
+
 ** `split-window' is no longer a command, just a non-interactive function.
 As a command it was a special case of `split-window-below', and as such
 superfluous.  After being reimplemented in Lisp, its interactive form