NEWS: Add item regarding tbl and line numbering.

$ cat ~/tmp/line-numbered-table.roff
.nm 1
Here is a line of output.
Sic transit adispicing meatballs.
Let's pad it out with more content to ensure the line breaks.
.TS
L.
This is my table.
There are many like it but this one is mine.
T{
My table is my best exhibit;
I will guard it as I guard my life.
Even as it requires multiple output lines for an entry.
T}
.TE
What is the line number now?

I defy anyone to defend this:

Unix Version 7 on a SIMH PDP-11/45 (and Heirloom Doctools troff today):

  1 Here is a line of  output.   Sic  transit  adispicing  meatballs.
  2 Let's pad it out with more content to ensure the line breaks.
  6 This is my table.
  7 There are many like it but this one is mine.
  8
  9   3 My table is my best exhibit; I will guard it
 10   4 as  I  guard  my  life.  Even as it requires
 11   5 multiple output lines for an entry.
 12 What is the line number now?

1 files changed, 8 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 1a2c75fd6..26ca909ac 100644
--- a/NEWS
+++ b/NEWS
@@ -137,6 +137,14 @@ o The token `.PY` is now recognized as a synonym of `.PF` to work around
   to use `.PF` to end pictures with flyback unless a similar problem
   faces your document.
 
+tbl
+---
+
+o GNU tbl now saves and restores the status of output line numbering
+  when formatting tables, including the count of lines for which
+  numbering is suppressed.  Historical tbl implementations did not, with
+  bizarre consequences when text blocks were used in tables.
+
 Macro packages
 --------------