Making it more transparent what WAS_FINAL_BACKSPACE does.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@5283 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -3,6 +3,7 @@
 	src/rcfile.c (parse_binding): When defining the toggles, give each
 	of them a sequence number, so that, when they are rebound, they can
 	still be listed in the original order in the help text.
+	* src/text.c (do_undo): Make it clearer what WAS_FINAL_BACKSPACE does.
 
 GNU nano 2.4.2 - 2015.07.05
 2015-06-28  Benno Schulenberg  <bensberg@justemail.net>

README

@@ -71,3 +71,6 @@ Current Status
 	GNU nano has reached its fifth stable milestone, 2.4.x.
 	Development of new features will continue in the 2.5.x branch,
 	while 2.4.x versions are dedicated to bug-fixing and polishing.
+
+
+

src/text.c

@@ -493,8 +493,13 @@ void do_undo(void)
     case JOIN:
 	undidmsg = _("line join");
 	/* When the join was done by a Backspace at the tail of the file,
-	 * don't actually add another line; just position the cursor. */
-	if (ISSET(NO_NEWLINES) || u->xflags != WAS_FINAL_BACKSPACE) {
+	 * and the nonewlines flag isn't set, do not re-add a newline that
+	 * wasn't actually deleted; just position the cursor. */
+	if (u->xflags == WAS_FINAL_BACKSPACE  && !ISSET(NO_NEWLINES)) {
+	    goto_line_posx(openfile->filebot->lineno, 0);
+	    break;
+	}
+	{/*FIXME: unindent*/
 	    t = make_new_node(f);
 	    t->data = mallocstrcpy(NULL, u->strdata);
 	    data = mallocstrncpy(NULL, f->data, u->mark_begin_x + 1);