[eqn] Add `delim on'.

* src/preproc/eqn/lex.cpp (start_delim_saved, end_delim_saved): New
global variables.
(do_delim): Handle `delim on' to restore previous start and end
delimiters.

* src/preproc/eqn/eqn.man, NEWS: Document it.

1 files changed, 14 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 8dcee201..6188cc8f 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,20 @@ This file describes recent user-visible changes in groff.  Bug fixes are not
 described.  There are more details in the man and info pages.
 
 
+VERSION 1.22.2
+==============
+
+Eqn
+---
+
+o A GNU extension
+
+    delim on
+
+  has been added to reactivate delimiters which have been disabled with
+  `delim off'.
+
+
 VERSION 1.22.1
 ==============