ed: don't crash when inserting in 64th char of the line

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 )
@@ -7,9 +7,7 @@
     _rbufsz IBUF _blen 2DUP > IF
         TUCK - ( ilen chars-to-move )
         SWAP EDPOS @ _cpos 2DUP + ( ctm ilen a a+ilen )
-        3 PICK MOVE- ( ctm ilen )
+        3 PICK MOVE- ( ctm ilen ) NIP ( ilen )
-        NIP ( ilen )
+    ELSE DROP 1+ ( ilen becomes rbuffsize+1 ) THEN
-    ELSE DROP ( ilen becomes rbuffsize )
-    THEN
     DUP IBUF EDPOS @ _cpos ROT MOVE ( ilen ) EDPOS +! BLK!! ;
 : I IBUF _type _I EDPOS @ 64 / _pln ;

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