expand-user-path porting note

svn: r7735

doc/release-notes/mzscheme/MzScheme_4.txt

@@ -67,19 +67,21 @@ in several significant ways:
         (define my-stuff ....)
         ....)
 
-    write
+   write
 
       #lang scheme/base
       (define my-stuff ....)
       ....
 
-    Note the absence of the parenthesis wrapping the module content
-    (it is terminated by the end-of-file) and the absence of the
-    redundant identifier `my-library'.
+   Note the absence of the parenthesis wrapping the module content (it
+   is terminated by the end-of-file) and the absence of the redundant
+   identifier `my-library'.
 
  - Under Unix, "~" is no longer automatically expanded to a user's
-   home directory. The `expand-path' function takes an optional
-   argument to explicitly expand the abbreviation.
+   home directory. The `expand-user-path' function from `scheme/base'
+   explicitly expands the abbreviation (but this function should be
+   used carefully; library functions should typically allow "~" to be
+   a relative path).
 
  - Hash table printing is enabled by default.