Add ibuffer-filter-by-derived-mode to ibuffer menu and doc

* lisp/ibuffer.el (ibuffer-mode-map, ibuffer-mode):
Add ibuffer-filter-by-derived-mode.

* etc/NEWS: Related markup.

1 files changed, 1 insertions, 0 deletions

diff --git a/etc/NEWS b/etc/NEWS
index 97e4f53620a..16feea02eaf 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -453,6 +453,7 @@ The option `follow-intercept-processes' has been removed.
 specifying URL types that should be converted to remote file names at
 the FFAP prompt.  The default is now '("ftp").
 
+---
 ** New Ibuffer `derived-mode' filter, bound to `/ M'.
 The old binding for `/ M' (filter by used-mode) is now bound to `/ m'.