patch 9.0.1479: small source file problems; outdated list of distrib. files

Problem:    Small source file problems; outdated list of distributed files.
Solution:   Small updates to source files and list of distributed files.
diff --git a/src/cmdexpand.c b/src/cmdexpand.c
index 2366157..b5a7a3e 100644
--- a/src/cmdexpand.c
+++ b/src/cmdexpand.c
@@ -1484,8 +1484,8 @@
  *  EXPAND_FILES	    After command with EX_XFILE set, or after setting
  *			    with P_EXPAND set.	eg :e ^I, :w>>^I
  *  EXPAND_DIRECTORIES	    In some cases this is used instead of the latter
- *			    when we know only directories are of interest.  eg
- *			    :set dir=^I
+ *			    when we know only directories are of interest.
+ *			    E.g.  :set dir=^I  and  :cd ^I
  *  EXPAND_SHELLCMD	    After ":!cmd", ":r !cmd"  or ":w !cmd".
  *  EXPAND_SETTINGS	    Complete variable names.  eg :set d^I
  *  EXPAND_BOOL_SETTINGS    Complete boolean variables only,  eg :set no^I