additional comments on two TODO items

1 files changed, 12 insertions, 4 deletions

diff --git a/TODO b/TODO
index 1d09e08f..60551694 100644
--- a/TODO
+++ b/TODO
@@ -1,6 +1,6 @@
 ************************************************************************
 * Official mandoc TODO.
-* $Id: TODO,v 1.286 2019/03/02 16:30:53 schwarze Exp $
+* $Id: TODO,v 1.287 2019/03/04 11:37:30 schwarze Exp $
 ************************************************************************
 
 Many issues are annotated for difficulty as follows:
@@ -162,9 +162,15 @@ are mere guesses, and some may be wrong.
 --- missing eqn features -----------------------------------------------
 
 - In a matrix, break the output line after each matrix line.
-  Found in the discussion at CDBUG 2015.
-  Suggested by Avi Weinstock.
-  loc *  exist *  algo *  size *  imp **
+  Found in the discussion at CDBUG 2015.  Suggested by Avi Weinstock.
+  This may not be the ideal solution after all: eqn(7) matrices
+  are lists of columns, so Avi's proposal would show each *column*
+  on its own *line*, which is likely to cause confusion.
+  A better solution, but much harder to implement, would be to
+  actually show the coordinates of column vectors on different
+  terminal output lines, using the clumnated output facilities
+  developed for .Bl -tag, .Bl -column, and also used for tbl(7).
+  loc *  exist *  algo **  size **  imp **
 
 - The "size" keyword is parsed, but ignored by the formatter.
   loc *  exist *  algo *  size *  imp *
@@ -321,6 +327,8 @@ are mere guesses, and some may be wrong.
 
 - a line starting with "\fB something" counts as starting with whitespace
   and triggers a line break; found in audio/normalize-mp3(1)
+  This will become easier once escape sequences are represented
+  by syntax tree nodes.
   loc **  exist *  algo **  size *  imp **
 
 - formatting /usr/local/man/man1/latex2man.1 with groff and mandoc