mandoc: additional comments on two TODO items

[schwarze@mandoc.bsd.lv]

Log Message:
-----------
additional comments on two TODO items

Modified Files:
--------------
    mandoc:
        TODO

Revision Data
-------------
Index: TODO
===================================================================
RCS file: /home/cvs/mandoc/mandoc/TODO,v
retrieving revision 1.286
retrieving revision 1.287
diff -LTODO -LTODO -u -p -r1.286 -r1.287
--- TODO
+++ TODO
@@ -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
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