diff -r fd0f919170d2 -r 63a57a2727b6 mercurial/help/subrepos.txt
--- a/mercurial/help/subrepos.txt	Wed May 20 01:06:09 2015 +0900
+++ b/mercurial/help/subrepos.txt	Sun May 17 22:42:47 2015 -0400
@@ -109,8 +109,10 @@
     elements. Subversion subrepositories are currently silently ignored.
 
 :files: files does not recurse into subrepos unless -S/--subrepos is
-    specified.  Git and Subversion subrepositories are currently
-    silently ignored.
+    specified.  However, if you specify the full path of a file or
+    directory in a subrepo, it will be displayed even without
+    -S/--subrepos being specified.  Git and Subversion subrepositories
+    are currently silently ignored.
 
 :forget: forget currently only handles exact file matches in subrepos.
     Git and Subversion subrepositories are currently silently ignored.