(Reverting): Document auto-revert-check-vc-info.

diff --git a/man/files.texi b/man/files.texi
index 4e944f83afd88393da1979a5b48dfe129e16898d..fa182655878d5615539fed7387063cee69829d3b 100644 (file)
--- a/man/files.texi
+++ b/man/files.texi
@@ -940,6 +940,15 @@ Auto-Revert Tail mode, @kbd{M-x auto-revert-tail-mode}.
 for a changed file.  Since checking a remote file is too slow, these
 modes do not check or revert remote files.
 
+@vindex auto-revert-check-vc-info
+  Whenever Auto Revert mode reverts the buffer, it updates the version
+control information, such as the version control number displayed in
+the mode line.  However, this information may not be properly updated
+if the version control state changes outside of Emacs---for example,
+if a new version is checked in from outside the current Emacs session.
+If you set @code{auto-revert-check-vc-info} to @code{t}, Auto Revert
+mode will update the version control status information periodically.
+
 @node Auto Save
 @section Auto-Saving: Protection Against Disasters
 @cindex Auto Save mode