LIST: simplify logic

There wasn't much of a reason to leave a loop early on 0x0d or null.
The idea was that once you have a CR or null, the rest is garbage
and you shouldn't see it.

However, it brought a problem: In VE, you couldn't insert characters
past that limit. It would be written, but never displayed. So let's
get rid of this logic and simply always display a 64x16 grid.

blk/111

@@ -1,5 +1,5 @@
 : _blen ( buf -- length of str in buf )
-    DUP BEGIN C@+ EOL? UNTIL -^ 1- ;
+    DUP BEGIN C@+ 0x20 < UNTIL -^ 1- ;
 : _rbufsz ( size of linebuf to the right of curpos )
     EDPOS @ 64 MOD 63 -^ ;
 : i COMPILE I ; IMMEDIATE ( save overshadowed )

blk/391

@@ -1,11 +1,10 @@
 : .2 DUP 10 < IF SPC THEN . ;
-: EOL? ( c -- f ) DUP 0xd = SWAP NOT OR ;
 : LIST
     BLK@
     16 0 DO
         I 1+ .2 SPC
         64 I * BLK( + DUP 64 + SWAP DO
-            I C@ DUP EOL? IF DROP LEAVE ELSE EMIT THEN
+            I C@ 0x20 MAX EMIT
         LOOP
         NL
     LOOP