Always terminate lines with EOL in the editor.

It is safe to do always instead of only when the line length was 0, this
ensures the editor never crashes on invalid input.

Author: dmsc

src/editor.bas

@@ -304,11 +304,8 @@ PROC CopyToEdit
   if linLen > 255
     linLen = 255
   endif
-  if linLen <> 0
-    move ptr, EditBuf, linLen
-  else
-    poke EditBuf, $9b
-  endif
+  move ptr, EditBuf, linLen
+  poke EditBuf + linLen, $9b
 ENDPROC
 
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